Why was darwin's theory of evolution more powerful and useful than the proposals of the other scientists?

Because Darwin visited plants and animals in their own environment and brought back proof. 4 example: he hypothesized that the shape of a sparrows beak was due to the environment for which it lived in and its main food source. he brought back examples of sparrows from different parts of the same island that proved his theory.

none of the other scientists traveled such distances, therefore, they were guessing wrong..

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!