Consumer (noun)

1. A person who buys goods or services.
2. An organism that feeds on other organisms in the same ecosystem.
3. An individual or group that has an impact on the environment by their consumption.

Origin:

Early 17th century: from latin consumere "use up" (see consume).

Examples:

1. The company is targeting younger consumers with its new product line.
2. The lion is a consumer at the top of the food chain.
3. As consumers, our choices have a direct impact on the environment.
4. The consumer has the right to return the product within 30 days.
5. The increase in consumer spending is driving economic growth.