correct answer is positive force → balanced force → negative force
when diego gives a big lift to the piano with the of pulley system that time, initially piano moves upward so positive force acts on it.
later, piano stops, in this condition balanced force act on it since force applied by diego is balanced by gravitational force of earth.
after some time piano starts falling in this condition negative force will act on the piano. in this condition, gravitational force will acts on piano in downward direction.
the gravity on the moon is different than on earth.
answer- capillary action and evaporation. it's not just the capillary action, but the pull from transpiration (the evaporation of water from the tree) that is used to pull water up from the roots. this is why the correct answer is option c) capillary action and evaporation.
hope this ! have a great day,