During the Great Depression, thousands of people changed social class unexpectedly, usually in a downward spiral. This event was the impetus for a type of social mobility called mobility.

Structural mobility

Explanation:

In simple words, Whenever societal developments allow a large number of individuals to migrate upward or bottom the economic class hierarchy, this is known as structural movement. Individual improvements are not responsible for structural mobility; rather, it is due to developments in community as a whole.

Thus, from the above we can conclude that the correct answer is structural mobility.

answer; i believe the correct answer is (117);

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.