Earth has had several mass extinctions throughout its long history. Which describes a mass extinction, but not background extinction

Earth has had several mass extinctions throughout its long history. How would you describe a mass extinction but not background extinction? Fossil evidence shows that some species changed very little over geologic time, while others changed gradually and at a relatively constant rate.

Iwould say d. eye contact and body language because you aren’t using any spoken communication. hope this : )

Lol why dont you actually do the work instead of have people do it for you. jk i do it too lol