What is the main characteristic of a keystone species?

the longest words mostly the correct answer 😁

In an arch made of stone, the center stone is known as the keystone.

You can see a nice example of this in a short video on youtube. its called "how wolves create rivers". How they revived yellow stones park failing eco system by introducing wolves.

Turambarka, Honeybees

Marilou27, yes right 😜

Marilou27, Right😂