What three things did pacholke and the two other correctional workers (an anthropologist and a sociologist) experiment with to try and prevent ‘fires' rather than just putting them out? briefly describe each and what the result was.

yes? sounds right, but you didn’t ask a question.

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.