Polio is a disease that can cause paralysis. doctors treated patients with casts and braces, but the work of elizabeth kenny led to the use of hot baths and exercise to treat polio victims. these patients had less incidence of paralysis. kenny’s ideas and their acceptance were due to

skepticism.
popular opinion.
open-mindedness.
scientific consensus.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.