Unconditioned (simple) and conditioned reflexes

Explanation

### Step-by-Step Solution:

**Step 1: Define Unconditioned Reflexes**
- Unconditioned reflexes, also known as simple reflexes, are innate responses that are present at birth. They are automatic and do not require any prior learning or experience.

**Example:**
- A common example of an unconditioned reflex is the response to a stimulus such as smelling food, which triggers the feeling of hunger. This reaction occurs naturally without any previous conditioning.

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