Q: What are regular changes in biology or behavior that occur in a 24 hour cycle?


Read this paragraph and choose the correct option from the provided answers:

Circadian rhythms are regular changes in biology or behavior that occur in a 24-hour cycle. In humans, for example, blood pressure and body temperature change in a regular way throughout each 24-hour day.

 Choices:

- cognitive rhythm

- auditory rhythm

- life cycle

- circadian rhythm


A:
circadian rhythm