The correct answer is option C) Pie chart.

A pie chart is a type of graph that is used to represent data in the shape of a circle. It is called a pie chart because it resembles a pie that has been cut into slices. Each slice of the pie represents a different category or data point, and the size of each slice is proportional to the amount or percentage it represents.

HTML Bullet Points:
- Definition of a pie chart
- Representation of data in the shape of a circle
- Resemblance to a pie cut into slices
- Each slice represents a different category or data point
- The size of each slice is proportional to the amount or percentage it represents

Pie charts are commonly used to display data that can be divided into categories or parts. They are particularly useful for showing the composition or distribution of a whole. The circle represents the entire data set, and each slice represents a subset or category within that data set.

HTML Bullet Points:
- Common use of pie charts
- Displaying data that can be divided into categories or parts
- Showing the composition or distribution of a whole
- Circle representing the entire data set
- Each slice representing a subset or category within the data set

Pie charts are visually appealing and easy to understand. The size of each slice provides a visual representation of the proportion or percentage it represents. This makes it easier to compare the different categories or parts and understand their relative importance or contribution to the whole.

HTML Bullet Points:
- Visual appeal and ease of understanding
- Size of each slice providing a visual representation of proportion or percentage
- Easier comparison of different categories or parts
- Understanding relative importance or contribution to the whole

In conclusion, a graph in the shape of a circle that is used to represent data is called a pie chart. It is a useful tool for displaying data that can be divided into categories or parts and provides a visual representation of the composition or distribution of a whole.

Introduction:
A graph is a visual representation of data that helps us understand and analyze information. Different types of graphs are used to represent data in different ways. One such graph is a pie chart, which is used to represent data in the shape of a circle.

Explanation:
A pie chart is a circular graph divided into sectors or slices, each representing a proportion or percentage of the whole. The entire circle represents 100% or the total amount of the data being represented.

Usage and Purpose:
Pie charts are commonly used to show the distribution or composition of a whole. They are particularly useful when comparing categories or parts and their relationship to the whole. Pie charts allow us to visualize the proportions and percentages of different components within a dataset.

Construction of a Pie Chart:
To construct a pie chart, we follow these steps:
1. Determine the data categories or components to be represented.
2. Assign each category a proportionate angle based on its percentage or proportional size.
3. Draw a circle or use a template to represent the whole data.
4. Divide the circle into sectors or slices according to the assigned angles for each category.
5. Label each sector with the category it represents.
6. Add a legend or key to provide further information about the categories.

Example:
Let's consider an example to illustrate the use of a pie chart. Suppose we have data on the favorite fruits of a group of people, and the data is as follows:

Apple - 30%
Banana - 25%
Orange - 20%
Grapes - 15%
Strawberry - 10%

To represent this data using a pie chart, we would follow the steps mentioned above. We would draw a circle representing the whole data and divide it into sectors based on the proportions assigned to each fruit. Each sector would be labeled with the corresponding fruit name, and a legend would be provided to explain the colors or patterns used.

Conclusion:
In conclusion, a pie chart is a circular graph used to represent data. It is particularly useful in showing the composition or distribution of different categories or parts within a whole. By visually representing proportions and percentages, pie charts provide an easy-to-understand and visually appealing way of analyzing data.