Biology: which substances are necessary for the synthesis of most materials in an organism?

Option D Enzymes

Explanation:

The substances necessary for the synthesis of most materials in an organism are biomolecules, that are required to perform biological functions.

The hormones act as messengers and are secreted in blood directly. The carbohydrates are the sugars and provide energy to the body. The antibodies works in protecting the body against pathogen. The enzymes are the catalyst that require substrate for their function. Almost all the metabolic process in the body for synthesis of any substance requires enzymes. Thus, option D is correct.

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.