What is the most important natural resource in the Middle East?
A. coal
B. lumber
silver
D. oil

What is a reasonable action that provides safe water for communities?

If a population is growing quickly in a small area then what must increase as well

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle