The primary purpose of the highway transportation system (hts) is to
a.) provide escape routes for natural disasters
b.) provide employment for federal and state workers
c.) move people and cargo safely and efficiently
d.) ease demands on other transportation systems

This is science by the way which of the following is an example of an environmental pressure a. the air pressure in the atmosphere b. a lake that is gradually running out of water c. a fight between two members of the same species d. breeding between two members of the same species