While Piaget proposed that formal operational thought is not fully settled in until around 15 years of age, evidence suggests that some people never fully employ formal operational thinking. Studies show that only of college students and adults achieve formal operational thinking, and other estimates run as low as .

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.

answer; social structure;