Answer:
operational definition
Explanation:
Operational Definition: This is a term used to describe the course of action of the research variables and the study. In this experiment, laugh can be defined operationally as a smile with a sound. Because of this operational definition, the psychologists can replicate the research or the experiment. The operational definition, when used to collect data, consists of a clear, and detailed definition of a measure.
Answer:
State governments came to depend on federal money to help them financially during a crisis The Great Depression did more to shift the United States towards a strong Federal system than anything else in the country's history.As a result of the Great Depression, central money and planning became the only way out of the Depression. States alone couldn't respond on behalf of their citizens.
Answer:
Americans lived in cities is the correct answer.
Explanation:
The answer is letter A. The Clear Air Act would be a reason for the Environmental Protection Agency or EPA to regulate car emissions. EPA sets the emission standards under the said rule or regulation and this also covers the green house gas emissions.
