Final answer:
Light, especially sunlight, plays a significant role in influencing the circadian cycle of an individual by synchronizing their internal clock with the daily solar cycle.
Explanation:
Light has the biggest influence on someone's circadian cycle. Exposure to light, particularly sunlight, synchronizes our circadian rhythm with the solar cycle, affecting our daily waking and sleeping cycles. The suprachiasmatic nucleus in the brain acts as the primary circadian pacemaker, analyzing light cues and regulating the release of hormones like melatonin for sleep.
Learn more about Circadian rhythm here:
https://brainly.com/question/35866163
