To move, nonmotile protists depend on?

~Air or water currents and other organisms.
~Cytoplasmic projections.
~Cilia and flagella
~Microtubules

I think its Air or water currents and other organisms.

Disagree. Google "protist movement."

The correct answer is "Air or water currents and other organisms." Nonmotile protists are unable to move on their own, so they rely on external factors to transport them from one place to another. This can be achieved through air or water currents, which can carry them to different locations. Additionally, they can hitch a ride on other organisms that can move, such as animals or even other protists. These external forces play a crucial role in the movement and dispersal of nonmotile protists.