George comes on a vacation to Indiaf rom US. The long journey disturbs his biological system and he suffers from jet lag. What is the cause of his discomfort?

Explanation

**Step-by-Step Solution:**

1. **Understanding Jet Lag**: Jet lag is a temporary sleep disorder that occurs when a person's internal body clock is out of sync with the time zone they are in. This often happens after long flights across multiple time zones.

2. **Cause of Jet Lag**: The primary cause of jet lag is the disruption of the body’s circadian rhythms. Circadian rhythms are the natural processes that regulate the sleep-wake cycle and other physiological processes over a 24-hour period.

3. **Impact of Time Zones**: When George travels from the US to India, he crosses several time zones. His body is accustomed to the light and dark cycles of his home time zone, but upon arrival in India, he encounters a different cycle, which confuses his biological clock.

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