Which of the following planets has a single satellite?

The planet Earth has a single satellite, which is called the Moon. A satellite is a natural or artificial object that orbits around a larger body, such as a planet. Jupiter has 79 known moons, Saturn has 82, and Uranus has 27. In contrast, the Earth has one large natural satellite, the Moon. The Moon is the fifth largest moon in the solar system and is thought to have formed about 4.5 billion years ago when a Mars-sized body collided with the Earth. It orbits around the Earth in a nearly circular path at an average distance of about 238,855 miles (384,400 kilometers). The Moon plays a significant role in the Earth's tides, and its gravitational pull affects the Earth's rotation and axis. It also has been explored by human spacecraft and is an important object of study for astronomers and planetary scientists.