The correct answer is Remains same.

Key Points 

• When a ball is thrown upward, its total energy remains the same.
• When an object is thrown vertically upwards, its potential energy keeps on increasing and kinetic energy keeps on decreasing.
• The total energy of the ball remains the same.
• At maximum height, the velocity is zero (no kinetic energy) and the ball will have only potential energy.
• The energy possessed by a body by virtue of its position is called potential energy.
• The energy possessed by a body due to its motion is called kinetic energy.
• Kinetic energy is always positive.
• Energy may be transformed from one form to another but the total energy of an isolated system remains constant.
• When an object is thrown vertically upwards then energy conversion takes place, energy can neither be created nor destroyed.