A bat's wing is used for flight while a monkey uses its hand to grasp objects. These structures
have different functions, but on an anatomical level, they have a very similar bone structure.
Darwin used this evidence to suggest that bats and monkeys share which commonality?

Common ancestors

Common mutation

Common fossils

Common parents

A. Common ancestors

Explanation:

Based on the evidence used by Darwin to explain the anatomical level on the bone structure of the bat and monkey. He made this assertion based on the comparison of species he saw on Galapagos Island with the kind of similarities with the ones from South America which made him conclude that the ancestors of both species are from South America. This is why Darwin talked about species having common ancestors.

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.

a. competition with other nations.