Final answer:
The large craters indicate Venus has a young surface, undergone widespread volcanic activity, and has low erosion rates. Its geological features are shaped by mantle convection, resulting in mostly lowland lava plains that resemble the lunar maria.
Step-by-step explanation:
The large craters on Venusian plains suggest that Venus has a relatively young surface, aging between 300 and 600 million years. The well-preserved state of these craters implies low rates of erosion and sediment deposition, pointing to limited geological changes since a significant resurfacing event. This resurfacing is thought to have been caused by widespread volcanic activity, which is also indicated by the presence of numerous volcanic features and coronae on the planet's surface.
Unlike Earth, Venus lacks evident signs of plate tectonics, as there are no subduction zones. However, internal heat transport via convection in the mantle has shaped the planet's crust, creating complex ridges and cracks. The majority of the Venusian surface is composed of lowland lava plains, similar to Earth's basaltic ocean basins, but they were formed through a different geological process since the lava plains of Venus resemble those of the lunar maria, which were also created by extensive lava flows.