Question

a scientist uses a special instrument to measure the depth of earths crust. he measures one location that is 65 kilometers deep. where is this section of crust most likely located? below a vast ocean below a deep canyon below a mountain range below an island volcano

Explanation:

Continental crust is thicker than oceanic crust. Mountain ranges have the thickest parts of the continental crust. A depth of 65 kilometers is indicative of a location beneath a mountain range. Oceanic crust is much thinner (5 - 10 km), and deep canyons and island volcanoes do not have such thick crustal sections.

Answer:

below a mountain range