If anybody knows these 3 answer plz

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Define dew point. i am writing this part to be able to ask the question

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.