B

Explanation:
The answer is “Median” because the median is the value separating the higher half from the lower half of a data set when the numbers are arranged in order. It represents the middle term in a set of ordered observations, which is a measure of central tendency in statistics.

Run-down:
The median is calculated by ordering the observations from least to greatest and identifying the middle number. This helps in understanding the central tendency of a data set, especially when outliers are present.