Answer:
Spinach and lettuce, broccoli and cauliflower
Answer:
A. a solid melts into a liquid
Explanation:
The planets in our solar system orbit the sun because of its large gravitational force just like how the moon orbits earth
Carbon Dioxide (or CO2) is produced by the lungs I think because when you inhale, you breathe in oxygen, then you exhale the carbon dioxide in the lungs. That's actually 3 and 4. As for number 2, I want to say either the alvioli or however that's spelled but technically, the entire body uses oxygen so I'm not sure.
1.With human to human contact.
2.By putting germs in your mouth.
3.Mouth to Mouth contacts.
4.By having someone cough on you.
