The terms would be:
1. should measure public opinion. <u>EXPERTS.</u>
Public opinion should be measured by Experts.
2. art of coming to an agreement by mutual concession. <u>COMPROMISE.</u>
Compromise is the act of coming to an agreement by means of mutual concession.
3. pamphlets, books and newspapers. <u>PUBLIC RELATION MATERIAL.</u>
Public relations uses promotional materials such as pamphlets, articles, books and newspapers.
4. carry on efforts to shape public opinion in order for government policies to be altered. <u>PRESSURE GROUP.</u>
A pressure group is a group that tries to influence or sway public policy.
5. determine the popularity of the individual as well as government policies. <u>PUBLIC OPINION POLLS.</u>
Public Opinion is the collective feelings of the population of an area which may or may not have a factual basis. The polls are the way of measuring those feelings.
Hope it helps!