What feature of the continent best suggests that they were once joined?

Just some of the things I can think of are:

Continents kind of fit together when joined, just like a jigsaw puzzle (notice the South American continent and the African continent).

The same type of artifacts were discovered on various places.

Tontic plates moved the contents apart about 1 ft in 12 years hou dh ourqwfohu ohisdafio hsadvhoi arsarsi