A membrane that allows only some materials to move in and out of the cell is B. Semipermeable.
Answer:
I'm pretty sure its C i haven't done this since 7th grade
This may not be the best answer but yeah: maybe we could restore the life by planting things and watering stuff. We could bring back shelters for the wild life. We will give it time to re-grow?
Explanation: Compound: A substance that is made up of more than one type of atom bonded together. Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.