Question

which relationship below is an example of competition in an ecosystem?
○a. squirrels nest in an oak tree, and insects live under the ground near the tree.
○b. birds eat the insects that cattle disturb while grazing, and they occasionally ride on the cows backs.
○c. rabbits eat the grasses and shrubs in a meadow, and wolves eat the rabbits in the meadow.
○d. bald eagles and black bears fish from the same mountain lake.

Explanation:

• Option A: Squirrels and insects are not competing as they occupy different niches (tree vs. ground).
• Option B: This is a mutualistic or commensal relationship (birds benefit from insects disturbed by cattle, no harm to cattle).
• Option C: This is a predator - prey relationship (wolves eat rabbits).
• Option D: Bald eagles and black bears are competing for the same resource (fish from the same lake).

Answer:

D. Bald eagles and black bears fish from the same mountain lake.