b/c of transpiration(:
The use the physical principle and property called "Turgor Pressure".
Capillary action & osmotic pressure.
b/c of transpiration(:
The force that acts against gravity is the buoyant force.
Any force, however small, can go against gravity.
gravity
Any upward force works against gravity,since they act in opposite directions.
the force of gravity
Weight (gravity).
Leaves fall down due to the force of gravity pulling on them.
A normal force.
Gravity!