Answer:
A living organism's position in the flow of energy through an ecosystem.
Fish are cold-blooded or poikilothermic, meaning that their body temperatures vary with the surrounding temperature. During the cold of winter fish become less active. They find little pockets out of the way of fast moving water where they can stay still and conserve energy.
The answer is faunal succession
Ketosis is a process that starts when your energy intake hasn't been enough, so ketone bodies, molecules produced by the liver, supply you with energy.
During ketosis, the ph of the blood decreases which means that the bloods acidity increases, which is not healthy.
Hope it helped,
BioTeacher101