In desert climates, the days are very hot and nights very cold. This is mainly because <span>there are always </span><span>clouds to trap or reflect heat to warm or cool the area</span>. The rest of the choices do not answer the question above
The main type of energy is oil and natural gas
This was called pangea the supercontinent was separated by faults and sea floor spreading there is evidence today they were all together
Answer: a)Copper and tin
Explanation: Copper and tin came into use at very early ages in the form of utensils, ornament etc. They were discovered in a way that it is possible for the people of early ages to extract these metals and melt them to give it some kind of shapes and utilize it for their daily living.People also started using these metals in the form of alloys as well which expanded the used of metals like copper, tin , bronze etc. Thus, correct option is copper and tin.