Answer: C. Desert
Explanation: Since deserts lack plant cover, rainfall, sheet wash, and stream flow are all extremely effective agents of erosion.
(Not sure bout Q.2.)
Air sinks downwards and spirals in a clockwise direction in the northern hemisphere & in the southern hemisphere, it spirals counterclockwise.
4. large and the objects are close together
Solid Iron is the answers to what the earths core is made of