I think the correct answer is C
The correct answer is nicotine. It is the main ingredient in a tobacco. Nicotine is an addictive substance thus overuse of the substance will lead to addiction. It acts as a stimulant and a depressant. Tobacco can be dried for smoking and can also be consumed directly.
Fossil evidence, rocks, and the shape of continents provide support for the theory of plate tectonics.
hope this helps, God bless!
They are living organisms in the ecosystem and make up part of the food chain.<span />
