Keystone Species Are

question 66

Multiple Choice

Keystone species are:

• A)always at the top of the food chain.
• B)always the most numerous.
• C)never at the top of the food chain.
• D)might be of any number, anywhere on the food chain.

---

Definitions:

Civil Engineering

The professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including works like roads, bridges, canals, dams, and buildings.

Greenhouse Effect

A natural process by which certain gases in the Earth's atmosphere trap heat, warming the planet and making it habitable, but which is exacerbated by human activities leading to climate change.

Environmental Issues

Problems related to the natural environment, including pollution, climate change, and biodiversity loss.

Environmental Costs

The negative impacts on the environment resulting from human activities, including pollution, resource depletion, and habitat destruction.