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

A. The artistic accomplishments of the ancient Greeks and Romans
B. The eruption of Mt. Saint Helens in 1980
C. The evolution of the first air-breathing animals that could live on land
D. The invention and development of computers and the Internet



Answer :

Final answer:

The evolution of the first air-breathing animals that could live on land is a crucial event in the geologic time scale.


Explanation:

The evolution of the first air-breathing animals that could live on land is a significant part of the geologic time scale. This event marks a crucial transition in the history of life on Earth, reflecting the adaptation of organisms to new environments and the subsequent diversification of species.


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