What term describes the group of planets including Mercury, Venus, Earth, and Mars?

• A. Gas giants
• B. Outer planets
• C. Rocky planets
• D. Dwarf planets

Answer: (C)

The term that describes the group of planets including Mercury, Venus, Earth, and Mars is "rocky planets." This is because these planets are primarily composed of solid rock and metal, which gives them a well-defined surface. They are also known for having a relatively small size and higher density compared to other types of planets.

In contrast, gas giants, which include planets like Jupiter and Saturn, are composed mostly of hydrogen and helium and do not have a solid surface. The outer planets generally refer to the gas giants in our solar system, while dwarf planets, such as Pluto, are smaller bodies that also orbit the Sun but do not meet all the criteria to be classified as full-fledged planets. Thus, "rocky planets" is the most accurate term for the group that includes Mercury, Venus, Earth, and Mars.