In order to lift the bucket up, the man is pulling the rope towards himself. So it's a pull. (1 mark)
Two boys are playing tug of war. So both of them are trying to pull rope towards themselves. (1 mark)
In the third case, a switch is being pressed with the help of a finger. So, the force is being applied on the switch by pushing on it with the help of the finger.
(1 mark)