Question

the thinnest layer of the earth is:
○ the crust
○ the mantle
○ the outer core
○ the inner core
question 5
what was the... (unclear text)

Explanation:

To determine the thinnest layer of the Earth, we analyze the Earth's layers: the crust, mantle, outer core, and inner core. The crust is the outermost layer and is much thinner compared to the mantle (which is thick and makes up a large portion of the Earth's volume) and the core layers (both outer and inner core are substantial in thickness). The crust ranges from about 5 - 70 km in thickness, while the mantle is around 2900 km thick, the outer core is about 2200 km thick, and the inner core is about 1200 km thick. So the thinnest layer is the crust.

Answer:

A. the crust