Force in general is push or pull action that changes the motion of an object.
Here are 3 examples:
1: A batter swinging a bat
The force that is created here is done by the muscles of your body. The object that the force acts upon is the bat.
2. A tree swaying.
The wind creates the force in this scenario, which acts on the tree. As the wind blows, it makes the trees sway.
3. A person standing on the ground
You might think where is the force there? The force is created by the gravity of Earth. This is what keeps us on Earth. The force created there is called weight.