Answer:
<u>S</u><u>peculation</u><u> is</u><u> </u><u>not</u><u> </u><u>a</u><u> </u><u>tool that</u><u> </u><u>helps</u><u> </u><u>you</u><u> </u><u>think</u><u> </u><u>as</u><u> </u><u>a</u><u> </u><u>geographer</u><u>.</u>
The main difference between the thickness and density of earths crust and mantle is the material making up each section. temperature and function also differ between the two sections
The answer for your question is true not false
World War 2 occurred in the late 40's, so this is most likely why there is a dip in that age group.