Para. 1-2 Surveys are an important part of American life They are used to find out more about the human being Para3-6 The most complete and important survey for Americans is the national census 11) A census offers information on population 2)2)A census also offers information on recent changes in American life 3A census helps the government and the people to understand and to adjust to the chaning societyhome Para.1-2 Para.3-6 The most complete and important survey for Americans is the national census. 1 1) A census offers information on population 2)2) A census also offers information on recent changes in American life 3) A census helps the government and the people to understand and to adjust to the chaning society. Surveys are an important part of American life. They are used to find out more about the human being