The right answer is True.
Convection refers to all the internal movements (vertical or horizontal) that drive a fluid and that then involve the transport of the properties of the parcels of this fluid during its movement. This transfer involves the exchange of heat between a surface and a mobile fluid in contact with it or the displacement of heat within a fluid by the overall movement of its molecules from one point to another.
This very common physical phenomenon occurs in many systems (including earth's crust). During the convection process, an increase in the velocity of the fluid also favors the possibilities of transforming a laminar flow into a turbulent flow, thus generating a turbulent convection which considerably accelerates the exchange of properties between adjacent layers of the fluid and in particular the diffusion of the heat within it.