How do these foods produce force, etc.?
What other elements do these foods contain?
Why are fats and oils more valuable as heat-givers than starch or sugar?
What elements unite and form water?
What is the proportion of water in the body?
Give its use?
Explain the difference in the digestion of starch and fat?
Why does starch need cooking?
To what kingdom does it belong?
Which section is of most value?