What are three things that an ecological pyramid shows that food webs and food chains do not show.

An ecological pyramid shows energy flowing through different ecosystems, the amount of energy that is being passed down, and the amount of organisms.

Explanation:

compost can be added to topsoil as a:

pesticide

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.