Answer: BECAUSE YOUR HOME NEEDS TOO BE CLEAN AND NOT BE DUSTY.
The exercises in the cross-training program is ordered this way is because the body needs to warm up to maximize function when it's put into full motion. Cardio gets the heart pumping. Strength training after cardio is a great way to enhance your strength training routine. Your body is at max level of "readiness"to accept the challenge of strength training and your muscles are ready to go. After strength training is flexibility to help the muscles recover from the exercises it just endured.
Answer: Reciprocity
Explanation:
Because of his help, which is not a small one since he has carried heavy things upstairs, he is hoping that reciprocity will make you willing to help him too.
This is referring to an obligation in returning the favor because he was doing that favor to you at first.
Then, both of you will have done a benefit that is good for both and this is considering a good action. He knows that you should be willing to do that more than anyone else because he has done favor to you.