What are the two main types of terrains found on the Moon?

The two main types of terrains on the Moon are correctly identified as highlands and lowlands. The highlands are more elevated regions that are heavily cratered and represent some of the oldest rocks on the Moon's surface. These areas are typically brighter and more rugged compared to their counterparts.

In contrast, the lowlands, often referred to as lunar maria (Latin for "seas"), are basaltic plains that formed from ancient volcanic activity. These regions are darker and smoother, reflecting the composition and geological history that distinguishes them from the highlands.

Understanding this distinction is essential for comprehending the Moon's geological history and how its surface features have been shaped over billions of years. The other options may highlight different aspects of lunar features but do not accurately capture the primary classifications of the Moon's terrain as highlands and lowlands.