I have attached an image answering your question.
Popliteus muscle
from: https://en.m.wikipedia.org/wiki/Popliteus_muscle
Answer: Our bodies stay fresh for a short period time, then enter <em>rigor mortis</em>, then began the slow process of decomposition.
Explanation:
D, hydrotrophism.
the word gives the answer away because Hydro is a word meaning water