Which of the following is the correct flow of oxygen in the human body? 1. oxygen moves from the alveolus and enters the blood stream to capillaries. 2. air moves down through the trachea to the lungs. 3. blood full of oxygen moves to the heart and then out to body cells. 4. breathing in air through nose and mouth. 5. air moves to alveolus in the lungs.

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.