The answer would be "D.Opening" because you are opening up a conversation
I remember this it is true
The answer is D. We use oxygen to breathe and make carbon dioxide . Plants take the carbon dioxide to photosynthesis and make oxygen.
Density = mass/volume
Yellow liquid: 2.8/2= 1.4 g/ml
Green liquid: 6/3= 2 g/ml
Red liquid: 1.8/2= 0.9 g/ml
Orange liquid: 1.3/1= 1.3 g/ml
hope this helps x
Answer:
A.
Explanation:
I think it is A because the other reasons are just nonsense. Plus, A makes more sense because they wouldn't go down there to explore the Grand Canyon how they do today. I mean, maybe? But no. It's A. :)