Question

which of the following is the best evidence of a biodiversity crisis according to ecological scientists?

a. increasing pollution levels

b. climate change

c. the incursion of a non - native species

d. high rate of extinction

Explanation:

A biodiversity crisis is defined by a significant loss of biodiversity. A high rate of extinction (Option D) directly indicates a rapid loss of species, which is the core sign of a biodiversity crisis. Increasing pollution (A) and climate change (B) are drivers, non - native species incursion (C) can disrupt ecosystems but is not the best evidence of a crisis itself. The best evidence is a high extinction rate as it reflects the loss of biodiversity.

Answer:

D. high rate of extinction