Organisms must regulate their body functions in order to maintain homeostasis?

This is true.

Explanation:

I don't know if there is answer choices but humans rely on homeostasis to keep their core temperature hovering around 98.6 degrees Fahrenheit, so that their bodies can maintain proper function. All living organisms, from plants to puppies to people, must regulate their internal environment to process energy and ultimately survive.

haploid cells;

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.