Answer:
apple falling from the tree
Step-by-step explanation:
When the apple is falling from the tee, the gravitational force of earth is acting on the apple. As the apple is in the gravitational filed of earth, so it is due to the field force.
A moving car is due to the force by the fuel.
Boat is rowing as you apply the force.
Pushing of chair is also due to the muscular force applied by you.