i need help on a question

a method of sending energy waves from a satellite to an area of earth being observed is

my choices are

conic projection
GPS
radar
navigation

radar is ok,

To determine the method of sending energy waves from a satellite to an area of Earth being observed, let's analyze each of the options provided:

1. Conic Projection: Conic projection is a cartographic technique used for representing the Earth's curved surface on a flat map. It is not a method of sending energy waves from a satellite.

2. GPS (Global Positioning System): GPS is a satellite-based navigation system primarily used for determining precise location and time on Earth. While GPS satellites emit radio waves for communication, they are not designed for sending energy waves for observational purposes.

3. Radar: Radar stands for "Radio Detection and Ranging." It uses radio waves to detect the presence, speed, and distance of objects. Radar is frequently used for various purposes, including weather monitoring, navigation, and military applications. It can also be used to send energy waves from a satellite to Earth for observational purposes, such as remote sensing or imaging.

4. Navigation: Navigation refers to the process of determining and following a path or route to reach a particular destination. It involves various methods and technologies, including GPS, radio beacons, and radar. While navigation can utilize energy waves for communication and positioning, it is not specifically related to sending energy waves from a satellite for observation.

Based on the information above, the correct choice for sending energy waves from a satellite to an area of Earth being observed is radar.