All of the following contribute to the deterioration of obsolete neighborhoods except

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

Explain why the rate of urbanisation is in the way it is between developed and undeveloped countries.

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa