Answer:
Explanatory variable – antioxidants
Response variable – colon cancer
Explanation:
People who eat lots of fruits and vegetables have lower rates of colon cancer than those who eat little of these foods. Fruits and vegetables are rich in antioxidants such as vitamins A, C, and E. Will taking antioxidants help prevent colon cancer? A medical experiment studied this question with 864 people who were at risk of colon cancer. The subjects were divided into four groups: daily beta‑carotene, daily vitamins C and E, all three vitamins every day, or daily placebo. After four years, the researchers were surprised to find no significant difference in colon cancer among the groups
Explanatory variable is when a variable is independent. It is not affected by any other variable. it can exist a;lone. a variable is said to be cntainer of value. So eating fruits and vegetables rich in antioxidants are tagged Explanatory Variables
Response Variables refers to variables that are dependent . response variable can change and rely on independent variables. They are affected by several factors. In this case the response variable will be the colon cancer, because it is dependent on if the people selected under observation eats fruits and vegetables or not
