How does this ecosystem maintain
a stable environment and/or how
does it change?

Ecosystem stability is the ability of an ecosystem to maintain a steady state, even after a stress or disturbance has occurred. In order for an ecosystem to be considered stable, it needs to have mechanisms in place that help it return to its original state after a disturbance occurs.

answer: because

explanation: idk

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.