Aperson who is gaining weight but lacking in some vitamins exhibits

The answer is D

D.  Malnutrition and Overnourishment

Malnutrition refers to deficiencies, excesses, or imbalances in a person’s intake of energy and or nutrients. Malnutrition results from a poor diet or a lack of food. It happens when the intake of nutrients or energy is too high, too low, or poorly balanced. Micronutrient-related malnutrition (a form of malnutrition) occurs when there is Inadequacies in intake of vitamins and minerals while Overnourishment is a form of malnutrition in which the intake of nutrients is oversupplied. The amount of nutrients exceeds the amount required for normal growth, development, and metabolism.

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.