American is made up of being a democracy, what makes our country so great is that the people have a voice. Voting gives the people the voice instead of higher powers choosing who runs our country, the people who make up our country get to choose and vote for who they think would continue to make our country great. (Not a Trump reference)
The method when an ecologist sets up a greenhouse and measures the effects of different levels of carbon dioxide on an endangered plant species is called experimenting. I hope that this is the answer that you were looking for and it has helped you.
