Final answer:
In this food web, the vulture and the seagull are examples of primary consumers. The seagull is the top consumer, feeding on both primary and secondary consumers. A predator-prey relationship exists between the minnow and the water flea. Interspecific competition is illustrated by the competition between different species of algae.
Step-by-step explanation:
Primary consumers are the organisms that consume the primary producers. In this food web, two examples of primary consumers are the vulture and the seagull. These organisms eat plants or other organisms that consume plants.
The top consumer in this food web is the seagull because it feeds on both primary consumers and secondary consumers, such as the water snake. It occupies the highest trophic level in the food web.
An example of a predator-prey relationship in this food web is between the minnow and the water flea. The minnow is the predator, while the water flea is its prey.
An example of interspecific competition in this food web is the competition for resources, such as sunlight and nutrients, between the different species of algae.