Question

a nutrition researcher observes that preschool - aged children who eat fewer vegetables are more likely to be overweight or obese than those children who eat more vegetables. the researcher then develops a/an _, a possible explanation for the observation, to guide her research project. multiple choice cohort analysis placebo hypothesis

Explanation:

• A "cohort" is a group in a study, not an explanation.
• "Analysis" is the process of examining data, not a possible explanation.
• A "placebo" is a fake treatment, irrelevant here.
• A "hypothesis" is a testable, possible explanation for an observation, matching the description in the question.

Answer:

D. hypothesis