Define population. Enlist main characteristics of population.

Explanation

### Step-by-Step Solution:

**Step 1: Define Population**
- A population is defined as the total number of individuals of a particular species that are present in a specific area at a given time. This definition encompasses all the members of that species living in a defined geographical region.

**Step 2: List Main Characteristics of Population**
1. **Natality**: This refers to the birth rate within a population, indicating the number of births occurring in a given period.

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