Question

radioactive isotopes remain in the ecosystem for a _______.
long period of time
less than 24 hours
a couple of days
very short time

Explanation:

Radioactive isotopes are unstable and decay over time, but some have long - half - lives and can persist in the ecosystem for extended durations. They are not typically eliminated within less than 24 hours, a couple of days, or a very short time.

Answer:

long period of time