The food web below represents the organisms that make up a freshwater ecosystem.
Suppose humans accidentally introduce a nonnative species of carnivorous bird to the region. If these birds feed exclusively on
large fish, which group or groups of organisms will be negatively impacted by this change?
insects
large fish
carnivorous mammals
ducks
aquatic plants
snails
cranes
small fish
(multiple choice)

Carnivorous mammals will be adversely affected by the introduction of carnivorous bird.

Explanation:

Carnivorous mammals will be affected because these carnivorous mammals feed on the large fishes and due to high feeding of carnivorous bird, these large fish decrease in population so food is not sufficient for the carnivorous mammals and they will die because of hunger and whole ecosystem will be disturbed.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.