Dr, Simon is a bioloical doctor, because eating disorders are biological.
Then the consumption of nutritious breakfast by children would be the predictor variable and academic success would be the criterion variable for the study.
Consumption of nutritious breakfast is the variable being manipulated or used to predict another variable. Academic success is the variable being predicted.
I think it’s b bc a and c both say count ur heart beat for one minute
Light or moderate. Hope I've helped you