This question is incomplete, here´s the complete question.
Which of the following scenarios is representative of mutualism?
a. Barnacles living on whales
b. Bees pollinating flowers
c. Birds feeding on insects stirred up by grazing animals
d. Mosses living on tree trunks
Answer: b. Bees pollinating flowers
Step-by-step explanation:
Mutualistic relationships are beneficial for both species participating in that sort of interaction. Mutualist partners exchange goods or services, even though is an unintended result of their interaction. Each species is acting exclusively in pursuit of their own interests.
Plant-pollinator mutualisms, such as bees pollinating flowers, are especially important because they involve many different plant and animal species.