The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that a) tropical communities are younger. b) tropical regions have more available water and higher levels of solar radiation. c) warmer temperatures cause more rapid speciation. d) biodiversity increases as evapotranspiration decreases. e) tropical regions have very high rates of immigration and very low rates of extinction

The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that  B) tropical regions have more available water and higher levels of solar radiation.

Hope this helped!!

c

explanation:

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.