What is the organism that is harmed in the parasitism called ? a: competitor b: host c: parasite d: prey

Can someone i have no idea of how to do this.

The earths core is made up mainly of what 2 substances? 2. like an egg, earth has a core, a layer surrounding the core, and a thin, hard outer layer. which layers of the earth match the layers of an egg?

If garbage is left on the street flies in microbes can arise from nothing to feed on it true or false