I believe you are asking about the "triangle" we were tought a simple triangle. Cells at the bottom because there are the most of them, tissues next, organ next, and organ system at the top. So I believe the answer you are looking for is Organ System.
Carlos is correct because produce can go longer without cooler temperatures (think of farmer markets the produce is out all day ) but meat and poultry can get spoiled faster
Answer:
I would encourage them that it is okay to do reasearch about exercising before they start exercising. I would also offer to do it with them. And lastly I'd remind them to love themselves and that it takes time to see changes.
The last organ before food gets to your stomach is the esophagus
