Question

multiple choice 2 points
what can the golden toads extinction teach scientists about amphibians as environmental indicators?
they regulate biodiversity through competition
their populations recover quickly after decline
their decline often signals ecosystem stress or instability
they are unaffected by climate conditions

Explanation:

Amphibians like the Golden Toad are sensitive to environmental changes. Their decline (and in the case of the Golden Toad, extinction) can indicate broader ecosystem issues. Biodiversity regulation through competition is not the key lesson here. Amphibian populations often do not recover quickly after decline (as seen with the Golden Toad). And they are very much affected by climate conditions (habitat loss, temperature changes etc. likely contributed to the Golden Toad's extinction).

Answer:

Their decline often signals ecosystem stress or instability