Question

into which layer of the earth do plate boundaries extend?
○ inner core
○ lithosqhere
○ lower mantle
○ asthenosqhere

Explanation:

To determine the layer where plate boundaries extend, we analyze each option:

• The outer core is liquid and not part of the lithospheric plates.
• The lithosphere consists of the crust and the rigid upper mantle, and plate boundaries are within the lithosphere as tectonic plates are part of the lithosphere.
• The lower mantle is below the lithosphere and asthenosphere, and plates do not extend there.
• The asthenosphere is a semi - fluid layer below the lithosphere, and plate boundaries are not in the asthenosphere (plates move over the asthenosphere).

Answer:

B. lithosphere