What evidence is there that mass extinction events occurred?

Although the best-known cause of a mass extinction is the asteroid impact that killed off the non-avian dinosaurs, in fact, volcanic activity seems to have wreaked much more havoc on Earth's biota. Volcanic activity is implicated in at least four mass extinctions, while an asteroid is a suspect in just one.

hope it helps. please mark me Brainleist please please.

Analogy is derived from a late middle English Greek language and it is used to describe a comparison of different things and is typical used to explain things in greater detail. For instance An analogy is like comparing an apple and an orange to describe the difference in colors. I have just used a analogy to describe an analogy. Antonym, this word is a mid 19th century word from the french and Greek languages. Ant meaning against and onuma meaning name. An antonym is a word that is the opposite meaning of another word. For instance Sad is the antonym of happy, since its meaning is the exact opposite. Synonym derives from late middle English by Latin and Greek. The different parts of the word are derived from the Greek alphabet onuma meaning name and sun meaning with. A synonym itself is a word  or phrase that just means the same or so close to the same as another word and or phrase that it doesn't really matter. For instance Sleep is a another word for slumber, in other words its another word that means the same thing.

you need to touch up on grammar and spelling, i wrote it rather fast...but here you go...you may use this for anything you need...

just so you know by me allowing you use it is not plagorism