Why two continents that may once have fit together no longer appear to today?

The movement of tectonic plates causes continents to drift apart over millions of years, resulting in the separation of land masses that were once connected. This process, known as plate tectonics, creates new oceanic crust at mid-ocean ridges and subducts older crust at convergent boundaries, altering the positions of continents over time. As a result, continents that were once contiguous may now appear separated due to this continuous geological process.