(( earth science ))

which event or set of events is a significant part of the geologic time scale?

a.
the evolution of the first air-breathing animals that could live on land

b.
the artistic accomplishments of the ancient greeks and romans

c.
the eruption of mt. saint helens in 1980

d.
the invention and development of computers and the internet

Explanation:

the evolution of the first air-breathing animals that could live on land

B.

the artistic accomplishments of the ancient Greeks and Romans

C.

the eruption of Mt. Saint Helens in 1980

D.

the invention and development of computers and the Internet

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes