Unit of evolution is

Options

A. Population
B. Species
C. Individual
D. Subspecies

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the unit of evolution. This means we need to identify the basic entity or level at which evolutionary changes occur.

2. **Analyzing the Options**:
- **Option 1: Population**: A group of individuals of the same species that live in the same area and interbreed.
- **Option 2: Species**: A group of organisms that can interbreed and produce fertile offspring.
- **Option 3: Individual**: A single organism.
- **Option 4: Subspecies**: A taxonomic category that ranks below species, often a geographically isolated population.

3. **Evaluating Each Option**:
- **Individual**: While individuals are the basic units of life, evolution is not measured at the individual level. Evolutionary changes occur in populations over generations.
- **Species**: Although species are important in classification, they do not represent the smallest unit of evolution.
- **Subspecies**: This is a more specific classification and does not encompass the broader concept of evolution.
- **Population**: This is the correct answer as evolution is primarily observed through changes in the gene pool of populations over time.

4. **Conclusion**: The unit of evolution is best represented by a population, as it encompasses all individuals of a species in a specific area and allows for the study of genetic changes over time.

**Final Answer**: The unit of evolution is **Population** (Option 1).

---