Answer:
The correct option is A. An airplane lifting into the sky during take- off.
Step-by-step explanation:
The force of the gravitational pull is known to act downwards. The objects which will move along this force i.e will move downwards will have positive action.
A negative action will act against the gravitational pull i.e a force that is applied in the upward direction. As an aeroplane is lifted upwards during taking- off i.e against the gravitational pull of the earth hence it will be considered as a negative action.