Answer: Lunar Highlands
Explanation:
Moon is the only natural satellite of Earth. It has synchronous motion around Earth, thus, only one side is visible always.Moon does not have atmosphere. So, moon has many such features which are not present on Earth like - Mare, Craters, Rays, Rills and Highlands.
The dark sea like regions filled with lava are Mares.
Craters are depressions on the surface caused due to meteor collision.
The streaks of debris radiating from large craters forms the Rays.
Cracks in the surface are Rills.
The oldest feature on moon surface are the highlands-the mountains and mountain ranges. These were formed by magma. The rocky remains transformed to highlands.These are also known as Terrae. These features are about 4.5 billion years old.