The answers would be:
Terrae
Deep areas of cooled lava
Here is more about your question:
Terrae is also known as the highlands of the moon's surface. The highlands are lighter in color than the other areas of the moon. They are mostly made up of feldspar. It is lighter in color because it reflects most of the light. These features formed as the lunar ocean cooled down.
Maria on the other hand, are the darker features of the moon. The singular form is Mare. These are areas of cooled lava that seeped out of the moon's interior as meteors hit it. They are mostly made up of basalt. These areas are dark, solid and flat.
