The answer is d- <span>psychoneuroimmunology</span>
Your answer is C: A rapid increase in the number of related species
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.
The answer is C. Either B or b