Question

Maria on the moon’s surface were formed by ancient _____.

Answer 1

Maria on the Moon were formed by ancient civilization

Answer 2

Maria are giant, what from Earth appear to be spots or black stains, that are actually plains of basalt (volcanic rock) that where formed by ancient volcanic eruptions.

Answer:

`\boxed{\bf~Volcanic~activity~/~volcanic~eruptions}`

Hope it helped,

BioTeacher101