Final answer:
Volcanism is the main rock transformation process on Venus, shaping its young surface through lava flows and resurfacing.
Step-by-step explanation:
On Venus, volcanism is the primary rock transformation process due to its lack of plate tectonics. Surface rocks undergo melting in hot spots and possibly through mantle plumes, producing lava flows and contributing to the resurfacing of the planet. The extreme surface temperatures and pressures on Venus lead to rock deformation but not to the same type of metamorphism seen on Earth due to the absence of water. Venus's surface is considered young, as suggested by the density of impact craters, indicating a history of volcanic activity that has resurfaced the planet.