How has charles darwin contributed to the study of evolution?
a)he proposed the theory of natural selection.
b)he excavated and studied fossils.
c)he was the first one to use a 3-d printer.
d)he proposed the genetic relationship between species.

A)He proposed the theory of natural selection.

Explanation:

The naturalist Charles Darwin stated that through natural selection the species of living beings have evolved from a common ancestor.

Darwin conceived natural selection as the differential survival of organisms. Darwin postulated that the gradual accumulation of variations will bring changes in organisms that result in the appearance of new species.

this is math not biology xd

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek