Roosevelt's purpose to include that message in the speech is to point out that the conservation of natural resources is key for the future of the Nation, and a matter of both its citizens and the government at every level.
will go and ask him
<span>about your coming here, then hurry back</span>
I believe C is correct, after reading through a few times I don't feel as though there is a defined topic sentence. The paragraph just seems to list facts without any true purpose.
The word would be extrinsic. Extrinsic means "<span>not part of the essential nature of someone or something; coming or operating from outside."</span>