The type and age of rocks found in this mountain rage are also found on another continent.what does this mean?

The presence of similar types and ages of rocks in a mountain range on one continent and another suggests that these landmasses were once connected, likely as part of a supercontinent. This phenomenon provides evidence for the theory of plate tectonics, indicating that tectonic plates have shifted over geological time. Such geological similarities can also inform scientists about past environmental conditions and the history of Earth's geological processes.