The four giant gas planets that are made primarily of lightweight elements are
AMercury, Venus, Earth, and Neptune.
BEarth, Saturn, Neptune, and Venus.
CVenus, Saturn, Uranus, and Neptune.
DJupiter, Saturn, Uranus, and Neptune.
AMercury, Venus, Earth, and Neptune.
BEarth, Saturn, Neptune, and Venus.
CVenus, Saturn, Uranus, and Neptune.
DJupiter, Saturn, Uranus, and Neptune.