Question

lichens are made up of two tiny living things: fungi and algae. the fungi live close together giving a lichen the appearance that it is a single organism. algae produce food through photosynthesis, and the fungi gather water. in this way, lichen can survive harsh weather that would kill a fungus or an alga growing on its own. lichens can grow on sand, trees, and even rocks but they are very sensitive to pollution sources and are seldom observed near factories or roads.
part a
which type of relationship is best represented by a fungi and algae in lichen?
a parasitic
b symbiotic
c predator - prey
d competitive

Explanation:

In lichens, fungi and algae live closely together with mutual - benefits. Algae produce food through photosynthesis and fungi gather water. This is a symbiotic relationship where both organisms benefit. Parasitic relationships involve one organism harming the other, predator - prey is about one organism eating another, and competitive is about organisms vying for resources.

Answer:

B. symbiotic