Answer:
B
Step-by-step explanation:
You can think of it as a very useless sponge and water.
If you have a dry sponge you can consider this an area of low concentration, and the bucket of water as an area of high concentration of water.
It is easy to soak up water with a dry sponge with osmosis when the high concentration easily fills the low concentration sponge.
On the other hand, a soaked sponge will have a great time trying to soak up a bucket of water with an already wet sponge.
This is a crude example of differing high to low or low to high concentration.
Osmosis is limited to water particles, whereas diffusion is basically molecules.
Osmosis is the movement of water along the concentration gradient.
Active transport is the use of energy to move particles against the concentration gradient so it is active, it is attempting to enact homeostasis.
Passive transport is the movement of particles by diffusion without energy so it is just passive, not aggressive.
Diffusion is the movement of particles along the concentration gradient.