Discuss different kinds of harmful drugs prevalent in the society today and their harmful effects on people. Why its consumption should be avoided?

Explanation

### Step-by-Step Solution

1. **Introduction to Harmful Drugs**:
- Begin by defining what harmful drugs are. These are substances that can lead to addiction and have detrimental effects on physical and mental health.

2. **Types of Harmful Drugs**:
- Identify and discuss various kinds of harmful drugs that are prevalent in society today:
- **Heroin**: An opioid that is highly addictive and can lead to severe physical and psychological dependence.
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