HELP The indicated protein is part of a cell membrane. What is the most likely purpose
of this protein?

It attracts unbalanced electrical charges in the cell’s environment.
It allows passage of particles into and out of the cell.
It releases stored chemical energy in membrane carbohydrates.
It manufactures phospholipids to repair membrane damage.

It allows passage of particles into and out of the cell

Explanation:

Cell membrane has proteins that help particles go in out of the cell. This type of passive transport is called facilitated diffusion.

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.