Well, Emiliano Zapato was a hero from mexico. He was a leading figure in the Mexican revolution. He was the inspiration for the agrarian called Zapatismo.
"to illustrate the close friendship between the men."
The answer is A. It shows that animals depend on this process for oxygen.
Photosynthesis is how Carbon dioxide (what we breathe out) is turned into Oxygen (what we breathe in)
If Photosynthesis never took place Oxygen would run out and animals would suffocate.
I would say C, because over the years myths build on how something may have happened
B. Withdrawal
Hope this helps