Answer:
D. Niger River
Explanation:
The most important source of fresh water in the western Sahel region is the "Niger River".
The Niger River is known to be the third largest river after the Nile and the Congo. It is the principal river of western Africa. It has a length of 2,600 miles (4,200 km). Niger River is known to be a typical Sahelian river. It has distinct wet and dry seasons. It's an important source of fresh water to Western Sahel.
The Sahel region is known to be a 3,860-kilometre arc-like land mass.
It lies in the south of the Sahara Desert and stretches east-west across the breadth of the African continent
Political, economic and cultural achievements play a vital role in bringing change in the society.
<h3>What is Society?</h3>
A society is the area where a group of people live, they share similar cultural values, their political values may differ but they live under the same economic environment.
Political achievements are important if the citizens of the society accept a single political leader there will be positive impact on the society and the society will prosper.
If Economic conditions are better, it is good for the society and its residents. The economic conditions are considered to be better when there is balanced interest rate.
Cultural values are important for a society, if there are different culture followers in a society there could be conflicts. However there are societies where people from different cultural backgrounds live together and they prosper.
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As the industrial revolution progressed, public education became available, churches became centrally heated, streets were paved, houses larger and better heated and lit, people were cleaner because bathing was easier sometimes, you could rent a ride to somewhere (cabs, omnibuses, trains, livery stables, ferries, ships) instead of have to own it or walk, there were hospitals and doctors a few minutes away instead of many hours, and there was food brought in from all over rather than just what you grew yourself.
There are a wide variety of jobs in town or a city instead of being a jack of all trades, master of none on a farm. Specialization means better income, more satisfaction, a reputation and status, proper tools and materials instead of improvised ones on the farm, training or advice, paying customers, and your own business or a good job.
containment was the US' attempt to prevent the spread of communism. they implemented things such as NATO which gave the western countries a defense team against communism, the Marshall plan which helped European countries recover after ww2 which stopped them from being vulnerable enough for the communist countries to take over. (they also used military force as seen in vietnam but its not a policy)
Answer: He called them molecules.
Explanation:
Boyle is an Irish chemist who is credited with replacing alchemy with modern chemistry. He is credited with defining the inverse relation between the absolute pressure and volume of an ideal gas, known as Boyle's Law.
Boyle called groups of atoms as molecules. It was the work of other researchers that distinguished between atoms and molecules many years later.