How can the transportation and communication system develop a country
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In areas where both communication networks and transportation systems are efficiently integrated, the ability to swiftly communicate, move people, and transport goods provides a strong base for the growth of trade and hence is a crucial factor in developing a stronger economy.

Based on the experiment, Harvey concluded that THE BLOOD MOVING TOWARDS THE HAND CONTAINS OXYGEN. The correct option is A. The blood carry oxygen and nutrients round the body for body cells to use. The blood moving toward the hand contains oxygen and some other nutrients. When a tight bandage was put around the hand, the blood circulation was cut off, the blood was not able to supply the needed oxygen to the cells in the hand, as a result of this deprivation, the fingers of the hand turned blue and cold. The situation was rectified when the blood circulation was restored.