To find:
The transformation of energy.
Step-by-step explanation:
When a rubber band is stretched, the rubber band gains elastic potential energy. Elastic potential energy is a form of potential energy which an object possesses due to the stretch or compression of the object.
The student transforms his kinetic energy into the elastic potential energy of the rubber band.
Final answer:
Thus when the student stretches the rubber band, the kinetic energy is transferred into potential energy.
Therefore the correct answer is option a.