Where does the roller coaster's kinetic energy come from?

It is converted potential energy

It was created by gravity

Hamsters ran in a wheel

Motors created the energy

I do know that it's not created by gravity

It should be  A) It is converted potential energy

Explanation:

Potential energy can be converted into kinetic energy, and kinetic energy can be converted into potential energy

Hope this helps u!!!

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.