The first organism to move into an area after primary disturbance are
A) Animals with long life
B) Large predators and and prey
C)Small plants and animals
D) plants that reproduce slowly

I'd say C

Explanation: Small plants are at the bottom of the ecosystem, which means they have to start it out. I'm not sure tho.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

allowed for the prediction of the properties of missing elements.