Answer:
The correct option is B. mallard eating aquatic invertebrates
Step-by-step explanation:
A predator can be described as an animal that feeds on other organisms which are known as prey. For example, in the option B, the mallard is the predator which is feeding on aquatic invertebrates. The aquatic invertebrates are the prey.
Other options are false because none of the other options show a predator- prey relationship. The option D is false because two males rams are not fighting for a prey in this example.