A variable is a named unit of data that may be assigned a value. If the value is modified, the name does not change. Some variables are mutable, meaning their values can change. Other variables are immutable, meaning their value, once assigned, cannot be deleted or altered.

Quantitative Character of an item:
Quantitative character refers to the numerical or measurable aspect of an item or variable. It involves the use of numbers and mathematical calculations to analyze and interpret data. In the context of statistics and research, quantitative character provides objective and precise information that can be quantified and compared.

Explanation of the answer:
The correct answer for the specific question is option 'B' - variables. Variables are used to represent the quantitative character of an item or phenomenon. They are measurable characteristics that can take on different values or levels.

Attributes:
- Attributes refer to the characteristics or qualities of an item. They can be qualitative or quantitative in nature.
- Qualitative attributes describe the properties or features of an item that are not numerical in nature. For example, the color of a car or the type of material used.
- Quantitative attributes, on the other hand, involve numerical measurements and can be used to represent the quantitative character of an item.

Variables:
- Variables are used to represent the quantitative character of an item or phenomenon.
- They can take on different values or levels, and their values can be measured and compared.
- In research and statistics, variables are used to collect and analyze data.
- They can be classified as independent variables, dependent variables, or control variables depending on their role in a study.

Figures:
- Figures refer to numerical values or data that are represented graphically.
- They can be used to visually represent quantitative information and provide a visual summary of data.
- Figures can include charts, graphs, diagrams, or any other visual representation of numerical data.

Tables:
- Tables are used to organize and present data in a structured format.
- They can be used to display quantitative information in a tabular form, allowing for easy comparison and analysis.
- Tables typically consist of rows and columns, with each cell representing a specific data point.

Conclusion:
In conclusion, the quantitative character of an item is represented by variables. Variables are measurable characteristics that can take on different values or levels. They are used to collect, analyze, and interpret quantitative data. Other options such as attributes, figures, and tables can also be used to represent quantitative information but do not specifically refer to the quantitative character of an item.