Which of the following is released by insects such as ants when they are in danger?

Options

A. Insulin
B. Adrenaline
C. Pheromones
D. Thyroxine

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks which substance is released by insects, specifically ants, when they are in danger.

2. **Analyzing the Options:**
- **Option 1: Insulin** - This is a hormone secreted by the pancreas in humans to regulate blood sugar levels. It is not related to insects or their defense mechanisms.
- **Option 2: Adrenaline** - This hormone is released during stress situations in humans, but it is not specifically related to ants or insects.
- **Option 3: Pheromones** - These are chemical substances released by insects, including ants, to communicate with others of the same species. They can signal danger and alert other ants.
- **Option 4: Thyroxine** - This hormone regulates metabolism in humans and is not related to the defense mechanisms of insects.

3. **Identifying the Correct Answer:** Among the options provided, pheromones are the correct answer. They are released by ants when they sense danger to alert other ants in the colony.

4. **Conclusion:** The correct answer to the question is **Pheromones**.

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