Which statement is true a. bones provide shape to the body
b. bones are composed of a single layer
c. bones are organ systems
d. bones help the heart pump blood

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.