Respuesta :
The Answer's D. A research question wants to know the relationship between variables, or why or how something affects something else, and D is the only option that wants to explore the relationship between two things.
An example of an effective research question is How does advertising affect a child's understanding of value?.
Option D is the correct answer.
What is a research question?
A research question is a kind of question that induces the researcher to start his/her research about the topic being asked.
- The question given in part A asks about a comparison between poor children and wealthy children with respect to toys.
- The question given in part B represents a quantitative question about the cost of the toy in the whole world.
- The question given in part C asks about the type of brand which is enjoyed by most of the children.
Therefore, the question given in part D represents research in relation to the effect of advertising on the values learned by a child.
Learn more about the research question in the related link:
https://brainly.com/question/4151568
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