Answer:
A.Testable hypotheses
it makes the most sense out of the rest
Muscles - they are meat, and animals will eat the meat. They also decompose, leaving no trace of the remains.
As epithelial makes the outer covering of all the organs and skin is also made of epithelial...so to be sure that it does not get depleted or destroyed due to friction and other external cause ...it should be highly generative !
Out of the photosynthesis (plants).
Largest energy found in the lowermost portion of the trophic level near "Producers" 'cause as it passes through the higher trophic levels, it get decreased by 10% at each step, according to Lindmann's 10% law!!
Hope this helps!!