Which of the following consists of rocks and metals?

The terrestrial planets are composed primarily of rocks and metals, which is a distinguishing characteristic that sets them apart from other types of planets. These planets—Mercury, Venus, Earth, and Mars—have solid surfaces and are made up of silicate rocks and metals such as iron. This composition gives them a denser structure and allows for geological activity, such as tectonics and volcanism, depending on their internal heat and conditions.

In contrast, the outer planets and Jovian planets, which refer to the same group, are predominantly made of gaseous materials and have thick atmospheres composed mostly of hydrogen and helium, lacking a solid surface made of rock or metal. The ice giants, like Uranus and Neptune, are primarily made of water, ammonia, and methane ices with smaller rocky cores, further distinguishing them from the rocky and metallic composition of terrestrial planets.