Answer: The study that involves the collection of information supported by opinions is the study of the effect of economic status on eating out.
This type of study typically involves collecting data through surveys, questionnaires, or interviews that ask individuals about their opinions, preferences, and behaviors related to a particular topic, in this case, the effect of economic status on eating out. The data collected can be analyzed to identify patterns or trends in behavior and to draw conclusions about how economic status may influence a person's likelihood of eating out.
The other studies mentioned in the question involve collecting data through observation or measurement rather than opinions. The study of the effect of playing in the rain on catching a cold involves observing the relationship between two variables - playing in the rain and catching a cold. The study of the effect of a full moon on human behavior involves measuring the behavior of individuals during different phases of the moon. The study of the effect of economic status on traveling involves measuring how often individuals travel based on their economic status.
Explanation: o