When Marlon gets adequate sleep the night before his intramural basketball games, he has more energy and can run faster and perform better. This can be attributed to
a. cognitive ability being restored during sleep.
b. conservation of body energy during sleep.
c. increased body temperature and caloric expenditure during sleep. d. increased brain activity during sleep.

Energy is important to perform all type of work and the individual can gain energy by eating food and doing regular exercise. Two main type of energy are potential energy and kinetic energy.

The individual feels energetic after doing proper rest. Marlon has basketball match, after getting proper sleep, the body is able to store the full energy that increases the Marlon performance in the basketball match. Sleeping is the best exercise to rejuvenate the body.

Thus, the correct answer is option (b).