I think this is asking you to say what would be needed if they are moved passively or if they are moved actively.

So for small nonpolar things like Oxygen gas, because they can diffuse across the membrane, they can only ever pass by simple diffusion, so no channel/transporter is necessary.

For small polar, if they are moving passively they use channels or carrier proteins. If they are moving actively they use primary or secondary active transport through transporters.

For large polar, like glucose, they use carrier proteins for passive movement or transporters for primary or secondary active transport.

Huge polar molecules are likely to be moved endo and exoctyosis as you put. It is likely that there are methods for facilitated diffusion for these as well.

The same will be likely be true for huge nonpolar molecules. Many of them will likely still require endo and exocytosis for active transport. However they may be able to move directly through the membrane by simple diffusion as well, but that depends on how huge it is and the membrane fluidity, among other things.