What is hepcidin?

(a) a substance produced in the spleen that stores iron
(b) an intestinal mucosa protein that assists in iron turnover
(c) a factor in meats that enhances iron absorption
(d) a substance in legumes that interferes with iron absorption
(e) a liver-derived hormone that regulate iron absorption and transport

The answer is E

Explanation:

A liver-derived hormone that helps regulate iron absorption and transport.

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.