In positively skewed distributions, the mean is usually greater than the median, which is always greater than the mode
It is clear that (AB) is a median, and it is obvious that the angle is 90, thus it is an altitude and a perpendicular bisector
Based on the wording of the question, I believe that the answer allows you to pick more than one. However, there still may only be one answer.
Some of the fertilizer can run off into streams and can harm fish and get in the streams