Correct Answer: A
Explanation:
Sol. Lamarckism is the idea that an organism can pass one characteristic that it acquired during its lifetime to its offspring.It is named after Lamarck who incorporated following two ideas into his theory of evolution, which are considered to be generally true:
1. Use and disuse of organs – Individuals lose characteristics which they do not require (or use) and develop characteristics that are useful.
2. Inheritance of acquired traits – Individuals inherit the traits of their ancestors.
In the context of organic evolution as explained by Lamarck, the loss of limbs in snakes in explained by the phenomenon of use and disuse or organs.