In recent decades rainforests throughout the world have been cut down for various reasons. in some cases the wood has been used; in others, the land. the deforestation of earth's rainforests has resulted in a) the rapid extinction of many species on earth. b) primary succession and evolution of new habitats. reactivate c) habitat destruction and the overall decrease in biodiversity. d) secondary succession and the development of new, successful ecosystems.

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.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds