ANS:A - on equator

To achieve a synchronous orbit, where a satellite orbits the Earth at the same rate as the Earth rotates, the launch site should ideally be on the equator. Explanation:

• A synchronous orbit is achieved when the orbital period of the satellite matches the rotation period of the Earth.
• The Earth's rotation causes objects on the equator to move faster relative to its center than those closer to the poles.
• Therefore, launching a satellite from the equator allows it to take advantage of the Earth's rotational speed, requiring less energy to achieve a synchronous orbit.
• Launching from a location other than the equator would necessitate additional energy to compensate for the lack of initial velocity provided by the Earth's rotation.