The term autotroph can be interchanged with the term producer;both terms refer to organisms that obtain energy from the sun TRUE/FALSE

True

Explanation:

Autotrophs (producers) are green plants and bacteria that produce their own organic nutrients for themselves and other members of the community.They can either make food from from light(photoautotrophs) or from chemicals (chemoautotrophs).They are self-feeders

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.