An ecosystem is self-sustaining as long as organ- isms have sufficient quantities of energy, oxygen, minerals, and water. when organisms die, some of these materials are recycled back to plants in the ecosystem primarily through the activity

you dont brother god luck

the answer is golgi apparatus

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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.