Answer:
During his voyage on the HMS beagle, Darwin postulated the theory of evolution by natural selection.
Explanation:
Darwin first formulated the theory of evolution by natural selection in his book "On the Origin of Species". According to this theory, evolution is the phenomenon by which the species modifies with time as a consequence of the modifications in behavioral or heritable physical traits. The modifications, which permits an organism to amend better with its surroundings will assist them in thriving and producing more offspring.
