Answer
If we increase the temperature of the air inside the ball, then the pressure inside the ball will increase. This increase in pressure can push outward on the ball and restore the ball to its original spherical shape.
Work Step by Step
The ideal gas law states: $PV = nRT$
If we increase the temperature of the air inside the ball, then the pressure inside the ball will increase. This increase in pressure can push outward on the ball and restore the ball to its original spherical shape.