Question

Where is the lithosphere thinnest?

Answer 1

Oceanic crust

Explanation:

Lithosphere is all the solid part of the Earth's surface. So, the crust and oceanic crust are included up to the upper mantle. The oceanic crust's depth is up to  

8

 

k

m

, up to the upper part of the mantle, the lithosphere is at its thinnest.