Final answer:
The statement is true; the lithosphere is broken into tectonic plates that move atop the asthenosphere due to mantle convection.
Step-by-step explanation:
The statement that the lithosphere is broken up into huge pieces that are floating on the asthenosphere is true. According to the Theory of Plate Tectonics, the Earth's lithosphere is divided into tectonic plates that fit together somewhat like a jigsaw puzzle. These plates consist of Earth's crust and the uppermost, rigid portion of the mantle, and they move around the globe at a rate of millimeters to a few centimeters per year, similar to the rate at which fingernails grow.
The driving force behind the movement of these tectonic plates is slow convection within the mantle. This process involves the transfer of heat from the warmer interior of Earth towards the cooler exterior, creating a natural cooling system for the planet. The asthenosphere is partially molten and flows plastically, which allows the rigid lithospheric plates to move on top of it.