Also, ocean crust is made of denser minerals than continental crust. The tectonic plates are made up of Earth's crust and the upper part of the mantle layer underneath. Together the crust and upper mantle are called the lithosphere and they extend about 80 km deep. So the Answer is D. Lithosphere hope it helps
Answer:
Actually, the answer is C. Tectonic Plate.
Explanation:
Tectonic plates are made up of the Earth's Crust and the upper part of the mantle layer underneath the Earth's crust. But, together they would make up the lithosphere . So, the lithosphere is both of them combined, it's not asking on what makes up the whole layer but a section of this layer. I hope I did an OK job at explaining!
