Drawin's Theory of Natural Selection was based on:

Options

A. Inheritance of acquired characters
B. Mutation
C. Enormous rate of reproduction in organisms, struggle for existenc and survival of the fittest
D. Changes due to the use and disuse of organs

Answer

### Step-by-Step Text Solution:

1. **Understanding the Question**: The question asks about the basis of Darwin's Theory of Natural Selection. It is important to identify the key components that influenced Darwin's ideas.

2. **Reviewing the Options**:
- **Option A: Inheritance of Acquired Characters**: This concept was proposed by Lamarck, not Darwin. Lamarck believed that traits acquired during an organism's lifetime could be passed on to offspring. This is incorrect in the context of Darwin's theory.

- **Option B: Mutation**: The mutation theory was introduced by Hugo de Vries, which suggests that evolution occurs through sudden changes in organisms. This is also not a basis for Darwin's theory.

- **Option C: Enormous Rate of Reproduction in Organisms, Struggle for Existence, and Survival of the Fittest**: This is a central tenet of Darwin's Theory of Natural Selection. Darwin observed that organisms tend to produce more offspring than can survive, leading to competition for resources. The individuals that are better adapted to their environment are more likely to survive and reproduce, which is known as "survival of the fittest."

- **Option D: Changes Due to Use and Disuse of Organs**: This is another concept from Lamarck's theory, which suggests that organs that are used become stronger, while those that are not used weaken. This is not part of Darwin's theory.

3. **Conclusion**: Based on the analysis of the options, the correct answer is **Option C: Enormous Rate of Reproduction in Organisms, Struggle for Existence, and Survival of the Fittest**. This encapsulates the essence of Darwin's Theory of Natural Selection.