The saying goes: "form fits function". This is one of the reasons why the human femur is larger and thicker than the humerus. If humans were to walk on "all fours" (like a dog or a cat), how might we expect our bone sizes to evolve

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.