Which one of the following is a terrestrial planet?
Terrestrial planets are Earth-like planets which are made up of rocks or metals with a hard surface making them different from other planets that lack a solid surface. Terrestrial planets also have a molten heavy metal core, few moons, and topological features such as valleys, volcanoes and craters.
In our solar system, there are four terrestrial planets, which also happen to be the four closest to the sun: Mercury, Venus, Earth and Mars