Question

3 what was the name of the supercontinent believed to have existed 250 million years ago? a pangaea b gondwana c laurasia d atlantis

Explanation:

Pangaea is the supercontinent that formed around 335 million years ago and began breaking up around 175 million years ago, matching the 250 million year ago timeframe. Gondwana and Laurasia were later smaller supercontinents that split from Pangaea, and Atlantis is a mythical island, not a scientific supercontinent.

Answer:

A. Pangaea