Weather is a factor is fish farming. Why might a fish kill occur when a pond "rolls over" due to weather?

A,) cause a & b are equal & both gives 180°

El nino is a weather phenomenon caused when warm water from the western pacific ocean flows eastward. part1baan average of 7.7 hurricanes and 3.6 major hurricanes compares to 5 hurricanes and 1.5 major hurricanes from 1995-2005

Answergoogle earth; i believe this is the correct answer, plz check first;