The biological interaction in which one organism hunts, kills, and eats another organism for energy is known as

The answer is predation because when a living organism eats another living organism (predator eating prey) it is predation and also the cycle of life. (Like how we eat our foods in our everyday life lol)

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.