Answer:
A- It is a required subject in evry school
B-agriculture
Explanation:
B. Oil, water can be renewed but oil cannot
<span>In the mantle, heat is transferred as soft rock flows slowly in cycles known as convection currents. convection currents are the currents that are caused due to the process of convection. It is actually one of the three main process of heat transfer. The other two process of heat transfer are conduction and radiation. </span>
The answer is, I believe, the Grand Canyon.
<span>Definition of uniformitarianism. :a geological doctrine that processes acting in the same manner as at present and over long spans of time are sufficient to account for all current geological features and all past geological changes — compare catastrophism.</span><span>
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