Periods are a way of grouping digits in a number to make it easier to read and understand. The periods are separated by commas in English-speaking countries. Each period represents a certain value depending on its position within the number.

The correct answer to the question is option 'A' which is hundreds. This means that each period in the number represents a value of hundreds.

Explanation:

1. Periods:
A period is a group of three digits separated by commas in a number. For example, in the number 123,456,789, there are three periods: 123, 456, and 789.

2. Place value of periods:
Each period in a number has a specific place value based on its position within the number. The place value of a period increases by a factor of 1,000 for each position to the left.

3. Value of periods:
The value of each period in a number depends on its place value. For example, in the number 123,456,789, the first period (123) has a value of hundreds, the second period (456) has a value of thousands, and the third period (789) has a value of millions.

4. Importance of periods:
Using periods in a number makes it easier to read and understand, especially when dealing with large numbers. It also helps to avoid confusion and errors when writing or reading numbers.

Conclusion:

In conclusion, the correct answer to the question is option 'A' which represents the value of hundreds. Periods are an important way to group digits in a number and give them meaning based on their place value. Understanding periods is essential for reading, writing, and understanding numbers in mathematics.

There are four periods
ones
thousands
lakhs
crores

the ones period consists of
ones
tens
hundreds