Question

1. which of these describes a biotic factor that uses an abiotic factor in its ecosystem to survive?

a. a hermit crab inside a shell
b. a bird nesting in a tree hollow
c. rabbits consuming grass
d. a tree producing acorns

Explanation:

• Option A: A hermit crab inside a shell. The shell is an abiotic (non - living) factor. The hermit crab (biotic factor) uses the shell for protection and survival.
• Option B: A tree hollow is part of a tree (biotic factor), so it is not an abiotic factor being used.
• Option C: Grass is a biotic factor. Rabbits consuming grass is a biotic - biotic interaction.
• Option D: A tree producing acorns is a biotic - biotic (tree - acorn, as acorns are part of the tree's reproductive system) interaction.

Answer:

A. A hermit crab inside a shell