Question

an ellipse has two focal points. one of the focal points is the ______.
○ moon
○ earth
○ sun

Explanation:

In the context of planetary orbits (which are elliptical), one of the focal points of the Earth's orbit around the Sun is the Sun. The moon is a satellite of Earth, and Earth is the orbiting body, not a focal point for its own orbit in the same way. So the Sun is one of the focal points of Earth's elliptical orbit.

Answer:

C. Sun