Fact 1: Vesicle transport requires energy, so it is also a form of active transport.

Fact 2: Active transport is another form of diffusion.

Given the two facts above, answer the question "what is vesicle transport a form of?" with the following options: 
- motion
 - direct energy
 - bioaerosols
 - relocation
 - diffusion
 - heat energy
 - communication
 - movement


 

     diffusion    