According of Darwin, the organic evolution is due to

Options

A. Competition within closely ralated species
B. Reduced feeding efficiency in one species due to the presence of interfering species.
C. Intraspecific competition
D. Interspecific competition

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Organic Evolution**: Organic evolution refers to the process through which complex plants and animals have evolved from simpler forms of life over time. This process involves gradual changes and adaptations.

2. **Darwin's Theory of Evolution**: Charles Darwin proposed the theory of evolution by natural selection. According to this theory, species evolve through a process of natural selection where individuals with advantageous traits are more likely to survive and reproduce.

3. **Role of Competition**: Darwin emphasized the importance of competition in the evolution process. He identified two types of competition: interspecific competition and intraspecific competition.

4. **Interspecific vs. Intraspecific Competition**:
- **Interspecific Competition**: This is the competition that occurs between different species. For example, two different species competing for the same food source or habitat.
- **Intraspecific Competition**: This is the competition that occurs within the same species. For instance, individuals of the same species competing for resources.

5. **Conclusion**: According to Darwin, organic evolution is primarily due to interspecific competition. This competition drives the evolution of species as they adapt to survive against different species competing for the same resources.

6. **Final Answer**: Therefore, the correct answer to the question is that according to Darwin, organic evolution is due to interspecific competition.

---