Who among the following is associated with the concept of appetency ?

Options

A. Lamarck
B. Charles Darwin
C. Wallace
D. Erasmus Darwin

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept of Appetency:**
- Appetency refers to the formation of new habits or structures in organisms. This occurs in response to new needs or desires that arise due to changes in the environment.

2. **Examples of Appetency:**
- A classic example is the long neck of the giraffe, which evolved as a response to the need to reach higher foliage.
- Another example is ducks developing webbed feet, which is a result of the constant stretching of their digits and skin for better swimming capabilities.

3. **Historical Context:**
- The concept of appetency was introduced by Jean-Baptiste Lamarck, a French naturalist, in the year 1809.

4. **Conclusion:**
- Based on the understanding of appetency and its historical association, the correct answer to the question is Jean-Baptiste Lamarck.

**Final Answer:**
Jean-Baptiste Lamarck is associated with the concept of appetency.

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