Answer:
C. Respiration.
Explanation:
To respirate means to breath and breathing takes oxygen out of the atmousphere. And it was the only one that made sence.
The mystery food sample did not test positive for protein using the Biuret indicator, so the sample can not be tofu, which is what Zack ate.
Student 2 has seen the most bio-diversity.
This is because all the others see animals of the same species.
As for the other parts of your question, I don't think I can help too much with that.
Answer:
the frog won't have nothing to eat then they will die and the snake won't eat the frog.
Explanation:
They have a light complexion, may have not wore sunscreen, or was in direct contact with the sun all day.
