Question

Why are frogs excellent indicators of the health of an ecosystem?

Answer 1

Amphibians make good indicator species because that they live in on land and in water indicate health of both.

Explanation:

Amphibians make good indicator species. It is because that live in two environments i.e., on land and in water.
The amphibians have thin skin that sometimes breathe through and also absorb toxic chemicals, radiation, and diseases.
There are lots of frogs and other amphibians in a habitat, it means the ecosystem is healthy.