What are the main categories of planets in our solar system?

The main categories of planets in our solar system are correctly identified as terrestrial planets and gas giants. Terrestrial planets, which include Mercury, Venus, Earth, and Mars, are characterized by their rocky compositions and solid surfaces. They are located closer to the Sun and have a distinct lack of thick atmospheres compared to gas giants.

Gas giants, on the other hand, comprise Jupiter and Saturn, which are significantly larger than terrestrial planets and have thick atmospheres primarily made up of hydrogen and helium. Additionally, Uranus and Neptune, often classified as ice giants, are distinct from the traditional gas giants but still fall under the broader category of planets that are not rocky.

While other options may introduce terms like "icy" or "dwarf," these do not reflect the primary classification system used for understanding the planets in our solar system based on their physical characteristics and compositions. The clear distinction between rocky and gaseous planets provides a fundamental understanding of the diversity and formation of the planets in our celestial neighborhood.