Name the force which is holding the atmosphere to the earth.

Hint:Gravity keeps down our atmosphere and the air we require to breathe and keeps it from flowing into space. Anything that possesses mass also has gravity. Objects with more mass have more gravity. All its mass creates a combined gravitational drag on all the mass in our body.

Complete step-by-step solution:
Gravity is that force by which a planet or other body pulls objects toward its center. The force of gravity holds all of the planets in orbit around the sun. Earth's gravity gets from all its mass. All its mass produces a combined gravitational drag on all the mass in your body. The sun's gravity holds Earth in orbit around it, keeping us at a comfortable distance to experience the sun's light and warmth.
Each system in the galaxy, and probably, the universe, has a barycenter. The push and pull of the objects' gravitational force keep everything in space from crashing into one another.
On Earth, all bodies have a load, or downward force of gravity, proportionate to their mass, which Earth's mass uses on them. The acceleration estimates the gravity that it gives to freely falling objects.
Our atmosphere is a compound of gases that surround Earth. It is held in place by the pull of Earth's gravity. If Earth were a much more minor planet, like Mercury or Pluto, its gravity would be too weak to hold a significant atmosphere.
Due to Earth's large force of attraction, escape velocity from Earth is greater for almost all the gases; this is why all the gases are maintained around the Earth; light gases like hydrogen cannot keep in the atmosphere because their escape velocity is more petite. Thus, we can say that the atmosphere is held by gravity.

Note:Still, all in all, Earth's environment is here to stay. Moreover, that is an excellent thing because our atmosphere shields life on Earth in many ways. It receives harmful ultraviolet radiation from the sun, helps maintain Earth's surface warm through the greenhouse effect, and decreases temperature maxima between day and night.