Final answer:
Plants developing colorful flowers to attract pollinators is an example of a functional adaptation.
Step-by-step explanation:
A functional adaptation is a trait that helps an organism perform a specific function or survive in its environment. In the given scenarios, option a) is an example of a functional adaptation. Plants developing colorful flowers to attract pollinators is a trait that helps them reproduce by attracting insects or animals that can carry pollen to other flowers. This adaptation increases the chances of successful pollination and reproduction.