4. Think about a food web in a marine, fresh-

water, or terrestrial ecosystem. Describe a

producer-consumer relationship, a predator-

prey relationship, and a parasite-host

In a terrestrial food web there are many organism that depend on the other organism for their food.

The Producers are the organism that has the ability to make food for itself and others. They are green plants which make food by the process of photosynthesis and the organism other than plants are consumers.

The birds and other large animals prey on small animals for their food. They are known as predators that feed on the prey for their food. Example: Lion feeding on deer.

There are many organism like tapeworm and flea that feed in the body of animals and human beings as an example of parasite and host relationship. The tapeworm lives inside the body of host and get nutrients from the host body.

Hence, there are many more relationship which exists in the food web.