Question

what has been the primary mechanism for the creation of the large - scale features of earths continents and crust?
view available hint(s)
volcanic activity that has built up the large mountain ranges
crumpling due to contraction caused by planetary cooling
expansion and contraction due to variations in solar heating
drift of crustal plates due to convection in the asthenosphere
cratering due to large - scale meteoritic impact

Explanation:

The primary mechanism for the creation of large - scale features of Earth's continents and crust is the drift of crustal plates due to convection in the asthenosphere. Plate tectonics theory explains that the movement of these plates (continental and oceanic) leads to various geological features such as mountain ranges (formed at convergent boundaries), mid - ocean ridges (at divergent boundaries), etc. Convection currents in the semi - molten asthenosphere (a layer in the upper mantle) drive the movement of the overlying lithospheric plates.
Cratering due to large - scale meteoritic impact is more relevant to the Moon and some other celestial bodies with less active geological processes. Expansion and contraction due to variations in solar heating is a minor factor compared to plate tectonics. Crumpling due to contraction caused by planetary cooling was an old - fashioned theory that has been superseded by plate tectonics. Volcanic activity is often a result of plate tectonic processes (e.g., at subduction zones or mid - ocean ridges) rather than the primary mechanism for creating large - scale continental and crustal features.

Answer:

drift of crustal plates due to convection in the asthenosphere