It is important to these countries because it provides them with resources for food,transportation, trade and religion
Food: the Nile provides fertile land for agriculture and plantation, also the inhabitants can feed off the animals in the river
Transportation: due to its immense length, people can transport through water across the river to reach certain destinations.
Trade: due to the facility of transportation people can move from one place to another and trade goods.
Religion: for example the people of Egypt held the river as a god and praise it for all the good it brought to them.
Sociology is a science every bit as much as biology or chemistry. Social sciences, like natural and biological sciences, use a vigorous methodology. This means that a social scientist clearly states the problems he or she is interested in and clearly spells out how he or she arrives at their conclusions. Generally, social scientistsground the procedure in a body of existing literature. This is precisely how other sciences function.
So, sociology is a science which attempts the interpretive understanding of social action in order thereby to arrive at a causal explanation of its course and effects.
The Industrial Revolution had a profound impact on the human population, which more than doubled during the period due to increased food production, advances in medicine, better sanitation and an increased birthrate.