Pinocytosis is an example of
a. osmosis.
b. simple diffusion.
c. active transport.
d. facilitated diffusion.

c. active transport.

An active transport is the process by which a substance is transported or transferred from one area to another using a chemical energy in the course. 

As oppose to passive transport, active transport’s key to its description uses energy to be able to transfer the said substance. This is important in a lot of aspects such as providing the needed elements or compounds in cellular activity.