The mute swan is a species of bird with an orange-reddish bill and white feathers. it is naturally found in europe and asia but can sometimes be found in the united states as a result of the importation of these non-native birds.

mute swans are one of the heaviest flying birds and consume up to 8 pounds of vegetation each day. how will the migration of mute swans into an area most likely affect the birds native to that area?

The native birds will decrease in numbers because there is not enough food for all the birds.

The correct option is D.
Paleontology is the study of the history of life on earth based on information and data that are obtained form fossils. Fossils are of different types, they can be remains of animals, plants, fungi, bacteria, etc. Information such as the structure of an organism, the environment in which it existed and its way of life can be obtained from fossils analysis. But fossils can not provide information about DNA because fossils don't possess nucleic acids on which DNA analysis can be based.