Where is glacial evidence found that supports continental drift?

The correct response identifies that glacial evidence related to continental drift is found in southern continents that are presently too warm for glaciers. This observation supports the theory of continental drift, as it suggests that these continents were once connected and situated closer to the South Pole during a past ice age when the climate was colder.

Finding glacial till and striations in these current warm areas indicates that they were once covered by ice sheets, which would be consistent with the position of landmasses in ancient geological periods. This evidence is critical for reconstructing historical continental positions and understanding how continents have shifted over time due to plate tectonics.

In contrast, the other options do not capture the essence of where significant glacial evidence can be found in relation to past continental arrangements. Polar regions today do exhibit glaciers, but they are not the only places where glacial evidence from ancient climates appears. Focusing solely on mountainous areas overlooks many other regions that also contain glacial deposits. Lastly, glacial evidence is not typically found in deserts, as these extremely dry conditions lack the moisture necessary for glacier formation. Thus, the selected answer aligns best with the scientific understanding of glacial evidence and its implications for continental drift.