Answer:
Internal validity.
Explanation:
Internal validity is the study in which trust relationship is build between treatment and outcome. This relationship is known as <em>cause-and-effect. </em>
In this type research, the studies are based on whether the finding is questionable or not. The research which can overrule the possibility of alternative explanations of our findings is internally valid.
The threats of internal valid study are:
- <u>Natural Improvement </u>
- <u>Maturation</u>
- <u>Historical Events</u>
- <u>Placebo effects</u>
- <u>Nonspecific effects</u>.
So, the correct answer is 'Internal validity'.
The stage of Piaget's Theory of Cognitive Development that corresponds with adolescence is the “Formal Operational Stage” (ages 11 or 12 and above) wherein abstract thinking, deductive reasoning, and logic increase.
Diseases, Weather, and Food Sources.
Socialism is a socio-economic system in which property and the distribution of wealth are controlled by the community for the purpose of achieving social and economic equality.
The correct answer is c - socialism.
This is the only possible correct answer. All of the other ones don't come into question. Communism is similar, but has slight differences in that sense which prohibit it from being correct.
The MAIN function of political parties in the United States is to:
D) help people with similar political ideas express their views.
