Restoration of native plants and habitats on campuses a. is limited to those campuses with large land holdings b. is costly to maintain but worthwhile for its educational value c. can provide ecosystem services such as slowing storm water runoff and filtering pollution d. is an attractive addition but of little academic use

Restoration of native plants and habitats on campuses can provide ecosystem services such as slowing storm water runoff and filtering pollution-c.

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.