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Explanation:

This phase starts on the first day of mensturation period . When ovum does not get fertilized , the high level of pogesterone hormone in the blood gets remarkably reduced .As a result , the endometrium layer of uterus gets degenerate and break down of capillaries . It causes a flow of blood from uterus for four days . This process of flow of blood along with the unfertilized egg is known as mensturation .

a. to encourage apoptosis

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.