Why do animals need to sleep?

A) Sleep is restorative.
B) Sleep may allow important brain circuits to remain activated.
C) Sleep may allow consolidation of memories.
D) All of the above are likely true.

Memory Consolidation

The biological process of making newly learned information more stable and durable in the brain, often during sleep.

Sleep

A spontaneous condition of both the mind and body marked by a change in consciousness, decreased sensory activities, and a suppression of almost all voluntary muscle movements.

Restorative

Having the ability to return health, strength, or a feeling of well-being.