I’m not 100% sure but I think it’s small
C)The two species cannot have viable offspring together.
An ecological niche can be defined as the functional role played by the organism or species in order to survive in it's habitat. Like the type of food consumed by the organism, type of mating mating season and others.
In the given situation, the thick beak birds likely to develop in a new species because of this typically adaptation. The two species may exhibit reproductive isolation as they may not be capable of inbreeding among themselves and cannot produce viable offspring together.
Food webs show the flow of energy (stored as organic molecules) through ecosystems. Thus, a scientist would use a food web to show the flow of energy through an ecosystem.
Out of the bear, elephant, badger and hamster, the one that is least like the others is the elephant. The elephant is not furry and has no hair like the other animals listed. Elephants also have a trunk and not a nose. The elephant also doesn't have claws like the other animals. All of the animals listed are mammals since they give live birth to their young.