1. I think it’s the last one but Here’s a little hint that could help? Osmosis is a diffusion of water through a selectively permeable membrane 2. Active transport 3. The second one I think but here’s something that might help, the cellular membrane is a thin flexible barrier that surrounds cell
Its is true that cell membrane is differentially permeable or semi permeable but it doesn't mean that it donot allow any harmful substances to entre in cell . Cell has its mechanisims to protect himself from harmful chemicals . Such as cells have lysosomes.
