ANS:B - earth

A geostationary satellite is one which orbits the Earth with a velocity of rotation of the: "Earth." A geostationary satellite orbits the Earth at the same rate that the Earth rotates on its axis, allowing the satellite to remain fixed relative to a specific point on the Earth's surface. This means that the satellite appears to be stationary from the perspective of an observer on the ground. The orbital period of a geostationary satellite is approximately 24 hours, which is the same as the Earth's rotation period. As a result, the satellite remains in a fixed position above a specific point on the Earth's equator, making it ideal for applications such as communication, weather monitoring, and surveillance.