Question

1. all the earths continents once formed a one giant landform called a earth. b the core. c pangaea. d tectonic plates.

Explanation:

The theory of continental drift states that all of Earth's continents were once joined together in a single super - continent called Pangaea. Earth is the name of the planet, the core is the innermost part of the Earth, and tectonic plates are the moving pieces of the Earth's lithosphere.

Answer:

C. Pangaea