Question

which of the following is true about continental drift? throughout the planet’s history, tectonic plates have remained in generally the same positions. tectonic plates float on the molten mantle and are constantly in motion. biodiversity is improved by the joining of continents, which decreases the amount of shoreline. the movement of tectonic plates is caused by earthquakes and volcanoes.

Explanation:

Continental drift theory posits that tectonic plates, which make up the Earth's lithosphere, float on the semi - molten asthenosphere (part of the mantle) and are in constant motion. Tectonic plates have not remained in the same positions throughout Earth's history. The joining of continents reduces biodiversity in some cases and earthquakes and volcanoes are results of tectonic plate movement, not the cause of it.

Answer:

Tectonic plates float on the molten mantle and are constantly in motion.