Which of the following provided evidence that led many scientists to accept darwin’s theory of natural selection instead of earlier theories?

I believe the answer would selective breeding. Natural selection is defined as breeding in order to create certain traits that allow for a better chance if survival among species. By people selectively breeding certain animals, they are able to see that traits can be changed through this process.
Hope this helps!

The name of the instrument that the scientist uses is called a microscope.a microscope is used to view objects which is not visible to the naked eyes