Mention two factors which are considered responsible for the increase in human population.

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for two factors that are responsible for the increase in the human population.

2. **Understand the Context**: The increase in human population can be influenced by various factors, but we need to focus on two specific ones.

3. **Factor 1 - Natality**:
- Define Natality: Natality, also known as the birth rate, refers to the number of live births in a population over a specific period of time.
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