The correct answer is A. Mercury and Venus.
Mercury and Venus are the two inner planets of the Solar System. They are both terrestrial planets, meaning that they are composed mostly of silicate rocks and metals. Mercury is the smallest planet in the Solar System, and Venus is the second smallest. Both planets have very thin atmospheres, and they are both very hot. Mercury’s surface temperature can reach up to 800 degrees Fahrenheit, while Venus’s surface temperature can reach up to 900 degrees Fahrenheit.
Mercury and Venus do not have any natural satellites. This is because they are very close to the Sun, and the Sun’s gravity has a strong pull on them. This pull makes it difficult for Mercury and Venus to capture and hold onto satellites.
The other options are incorrect because they include planets that do have natural satellites. Earth has one natural satellite, the Moon. Mars has two natural satellites, Phobos and Deimos. Jupiter has 79 known natural satellites, Saturn has 82 known natural satellites, Uranus has 27 known natural satellites, and Neptune has 14 known natural satellites.