In the 1980s, for the First Time in the 20^th

question 61

Multiple Choice

In the 1980s, for the first time in the 20^th century

• A) income gaps widened between the richest and the poorest Americans.
• B) middle-class incomes rose.
• C) the poor made economic gains.
• D) the economy was uniformly healthy.
• E) the majority of Americans were middle class.

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Definitions:

Population Differences

Variations observed between groups of the same species, often driven by genetic, environmental, or social factors.

Developmental Explanation

An approach that interprets behaviors or traits based on changes that occur through an organism's growth and development stages.

Song Matching

A behavioral phenomenon where a bird responds to the song of another individual with a song that is similar in structure and pattern.

Young Adult

An individual in the transitional phase of growth and development between adolescence and full adulthood, typically considered to be in their late teens to early twenties.