earth and the moon are kept in thier respetive orbits due to the influane of...

A)inertia
B)gravity
C)both inertia and gravity
D)neither inertia or gravity
I think its C both of them

You are correct! The Earth and the Moon are indeed kept in their respective orbits due to the influence of both inertia and gravity. In order to understand why, let me explain the concepts of inertia and gravity.

Inertia is the tendency of an object to resist changes in its state of motion. In the case of the Earth and the Moon, both are constantly moving in their respective orbits. Because of inertia, they want to continue moving in a straight line. However, gravity comes into play.

Gravity is the force that attracts objects with mass towards each other. In this case, the Earth and the Moon are attracted to each other by the force of gravity. Their masses and the distance between them determine the strength of this gravitational force.

Now, how does both inertia and gravity keep Earth and the Moon in their orbits? The initial motion of the Earth and the Moon carries them forward, thanks to inertia, but the gravitational force between them also pulls them inward. This results in a delicate balance between inertia and gravity.

As a result, the Earth and the Moon continuously fall towards each other due to gravity, but they also constantly miss each other due to their forward motion. This balance between the gravitational attraction and the inertia of their motion causes them to keep orbiting one another.

To conclude, both inertia and gravity play essential roles in keeping the Earth and the Moon in their respective orbits. Inertia provides the initial motion to keep them moving forward, while gravity pulls them inward and creates the inward force necessary to maintain their orbits.