Answer is c just took the test
Animal plays important role in angiosperm reproduction either by visiting flowers for the process of pollination or eating fruits which aids in continuation of generation
I honestly think it is D. Impulses.
Answer:
So they are lighter and move quicker.
Explanation:
With the small wings and bodies birds have it would be hard for them to escape predators and lift their own weights if their bones were dense like humans' bones. The hollow part of the birds' bone is connected to their lungs so they have enough oxygen to fly easily. Hope this can help you! :)
