Answer:
Top-Toluene
Middle-Water
Bottom-Chloroform
Explication:
Chloroform is on the bottom layer because it is the densest liquid.
Toluene is on the top because it is the least dense.
Water is between the two because it’s density is between chloroform and toluene.
The answer you're looking for is photosynthesis
Helium bc when u vape it goes into it lungs but also bringing helium at the same time.