How does simple diffusion differ from facilitated diffusion?

Facilitated diffusion crosses a membrane with the aid of passive transport proteins in the membrane.

Both simple and facilitated diffusion are spontaneous, meaning they require no energy for it to occur. Simple diffusion is for nonpolar molecules because they are able to pass through the nonpolar/hydrophobic membrane easily, whereas polar (hydrophilic) molecules have a hard time. Facilitated diffusion makes it easier for polar molecules to go through the membrane WITH the help of protein channels.

So the difference is that facilitated uses protein channels whereas simple does not.

answer: the answer is b

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.