Question

the one particular species that maintains the stability in the ecosystem keystone species apex predator tertiary consumer rewatch question

Explanation:

A keystone species is crucial for maintaining ecosystem stability. It has a disproportionately large impact relative to its abundance. For example, sea otters (a keystone species) control sea urchin populations. If sea otters decline, sea urchins overgraze kelp forests, disrupting the entire ecosystem. An apex predator (like a lion) is at the top of the food chain but not all apex predators are keystone species. A tertiary consumer is just a trophic level (e.g., a hawk eating a snake that ate a mouse). The key is the role in maintaining overall ecosystem structure and function, which is what keystone species do.

Answer:

Keystone Species