Final answer:
The adaptive hypothesis suggests that an increase in animal activity or energy expenditure would result in increased sleep to allow for recovery and restoration of expended resources.
Step-by-step explanation:
According to the adaptive hypothesis of sleep, an animal would engage in more sleep if the amount of activity or energy expenditure increases. This theory asserts that sleep is necessary for restoration and recovery from daily energy use. If individuals have a higher level of activity, they deplete more resources and as a result, would theoretically require a longer sleep duration to recover those resources. Additionally, sleep has been associated with cognitive benefits such as creative thinking, language learning, and processing emotional information, suggesting that an animal's sleep patterns are influenced by various factors including energy conservation and cognitive restoration.