Charles darwin
a. proposed natural selection as the mechanism of evolution
b. was the first person to conclude that organisms evolve
c. was the first to realize that fossils are remains of ancient organisms
d. proposed that unused parts of the body deteriorate
e. eagerly published his theory before it was well-developed

Option- A: Is the best option to choose from the given four, as we have the explanation given as below;

Charles Darwin: He was a British naturalist who proposed the theory of biological evolution by natural selection.The mechanism that Darwin proposed for evolution is natural selection.

Explanation:

Darwin’s process of natural selection has four components:

autosomal

explanation:

is a term used in genetic genealogy to describe dna which is inherited from the autosomal chromosomes

search in internet u can get it