3. Hindus first had the concept of zero, and then Arabs borrowed that concept and thought it to the western world.
Explanation:
In one way or another every civilization had its own numeric system. Some systems were more advanced and more practical while some not so much. Even though the empires in general had tensions between them and were not very fond of each other, they were still regularly contacting with each other, especially through trade.
Through the trade all sorts of ideas and technologies got shared, so they were spreading out relatively easy and fast. The Arabs were in between the Hindus and the Europeans and in many ways they controlled big portion of the trade. The Arabs saw that the Hindus have something that they lacked in their numeric system, the concept of zero, which was making the counting much easier and practical. The Arabs adopted this concept.
Because they were in constant contact with the western world as well, once they established the concept of zero, the Europeans noticed it and borrowed it from them as they saw it as useful one and better than the system they have. The manner in which the concept of zero spread is very similar to how the modern globalization works.
The help of caring, informed adults is most essential to a teen developing a separate identity from his parents and setting healthy boundaries
Answer: Option D
<u>Explanation:</u>
Teenage or adolescence is transition period between childhood and adult. During this period every child undergoes tremendous growth as well as challenges. Role of parents and other adults become very crucial at this stage.
It is very essential that adults are caring and understanding towards the adolescent and provide him or her with necessary support. It is the duty of the adults to offer the adolescent with as many positive choices as possible so that they can make their decisions effectively.
Jackson became the first President whose home state was neither Massachusetts nor Virginia, while Adams was the second to lose re-election, following his father, John Adams.
Native americans and africans
