What image ? you have to attach it
Yes it's a test taken in high school
Im 10 but a big brain
Answer: Prevailing winds actually play an essential role in the Earth's heat distribution by ushering relatively warmer air to higher latitudes, and moving cooler air toward the equator. Prevailing winds tend to primarily blow either from the east or the west, depending on latitude.
The technique to improve internal validity is D) Addition of a control group.
<h3>What is
internal validity?</h3>
Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.
it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.
Learn more about internal validity on:
brainly.com/question/968894
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COMPLETE QUESTOIN:
Which of the following is a technique to improve internal validity ____________?
A) Experimenter expectancy
B) Participant bias
C) Use of a confederate
D) Addition of a control group
