**Core Concept**
The median is a statistical measure used to describe the central tendency of a dataset. It is calculated by arranging the values in ascending or descending order and selecting the middle value. If there is an even number of values, the median is the average of the two middle values.

**Why the Correct Answer is Right**
To find the median of the given dataset, we need to arrange the values in ascending order: 2, 5, 7, 10, 10, 13, 25. Since there are 7 values, which is an odd number, the median is the middle value, which is the 4th value in this case. The 4th value is 10. This is because the median is a measure of central tendency and represents the value that separates the higher half from the lower half of the dataset.

**Why Each Wrong Option is Incorrect**
**Option B:** 13 is incorrect because it is the 6th value in the dataset, not the middle value. The median is not necessarily the highest or lowest value in the dataset.

**Option C:** 25 is incorrect because it is the highest value in the dataset and does not represent the central tendency of the values.

**Option D:** 5 is incorrect because it is the 2nd value in the dataset and does not represent the middle value.

**Clinical Pearl / High-Yield Fact**
When calculating the median, it is essential to arrange the values in ascending or descending order to ensure that the middle value is accurately identified. This is particularly important when working with datasets that contain outliers or duplicate values.

**✓ Correct Answer: A. 10**