Answer: I think three red and one white.
Hope this helps.
Explanation:
Answer:
My guess would be H₂O/ water, since osmosis is a form of passive transport and I can't see the model the question references. Gases like O₂/ oxygen, CO₂/ carbon dioxide, and simple sugars like glucose can also pass through a cell membrane with passive transport though.
3 increases the temperature so fast it boils fish