Feeling the tremors of an earthquake, a scared resident of thirteenth floor of a multistoreyed building starts climbing down the stairs rapidly. Which hormone initiated this action?

Options

A. Oxytocin
B. Thyroxine
C. Adrenaline
D. Progesterone

Explanation

To answer the question about which hormone initiated the action of the scared resident climbing down the stairs during an earthquake, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Situation**: The resident is experiencing fear due to an earthquake. This is a stressful situation that requires a quick response.

2. **Understand the Body's Response to Stress**: In stressful situations, the body activates its 'fight or flight' response. This response is crucial for survival and involves various physiological changes.

3. **Hormonal Response**: The primary hormone responsible for initiating the 'fight or flight' response is adrenaline, also known as epinephrine. This hormone is released from the adrenal glands, which are located on top of the kidneys.

4. **Function of Adrenaline**: When adrenaline is released into the bloodstream, it prepares the body to respond to the emergency. It increases heart rate, boosts energy supplies, and enhances blood flow to muscles, allowing the individual to react quickly.

5. **Conclusion**: In this scenario, the hormone that initiated the action of the resident climbing down the stairs rapidly is **adrenaline**.

### Final Answer:
The hormone that initiated this action is **adrenaline**.

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