Question

a human population uses coal as its primary energy source. the graph on the left shows how the concentration of so₂ and noₓ in the atmosphere changes as the human population grows and coal consumption increases. the graph on the right shows how biodiversity changes under the same conditions.
which statement is supported by the graphs?
a. biodiversity increases as so₂ and noₓ concentration increases.
b. biodiversity decreases as so₂ and noₓ concentration increases.
c. there is no relationship between biodiversity and so₂ and noₓ concentration.
d. biodiversity continues decreasing as so₂ and noₓ concentration decreases.

Explanation:

Step1: Observe left - hand graph

As years pass and coal consumption increases, SO₂ and NOₓ concentration rises.

Step2: Observe right - hand graph

As years pass (same time scale as left graph), biodiversity decreases.

Step3: Analyze relationship

When SO₂ and NOₓ concentration increases, biodiversity decreases.

Answer:

B. Biodiversity decreases as SO₂ and NOₓ concentration increases.