The large, roughly circular, dark, and somewhat younger regions on the Moon are called:
A) highlands
B) maria
C) rilles
D) tectonic blobs
E) anti-cyclones

Question

Quizplus · Accepted Answer

The large, roughly circular, dark regions on the Moon are known as maria. They are younger than the surrounding highlands and are believed to have formed from ancient volcanic eruptions that filled huge impact basins with lava.

The Large, Roughly Circular, Dark, and Somewhat Younger Regions on the Moon