Question

Your friend Chris is interested in studying rats. He usually feeds them seeds, which is their normal diet. Sometimes when they are very good eats, he gives them cheese as a treat. He notices that his best-behaved rats are also very fat. How can he prove that the cheese treats are the cause of this weight gain?

Answer 1

using simple common sense we can see that the best preformed rats get more food, which makes them fat

Step-by-step explanation: