A full definite reason that led to the decline of the Indus Valley Civilization is not known, as no reliable resource of that period is available right now. Every conclusion regarding the decline is based upon speculations of historians on what they believe. Through research it is clear that fall of the Harappan Civilization occurred between 1800 BC to 1700 BC(ish). It is highly believed that the Aryans were the next settlers. They were skilled fighters, so their attack might have led to the fall of Harappan Civilization. Even The human remains found during excavation of Indus valley point towards some violent because of their death
Answer:
B - The printing press allowed mass production of books that spread new scientific ideas.
Explanation:
Before the printing press exist, books are could only be excursively accessed by the nobles and a select few scholars. After the printing press exist, the books can be accessible by all people. this provide them with opportunities to learn scientific ideas and accelerate the scientific revolution.
Answer: Sadly I do not know
Explanation:
The correct answer is the Gadsden Purchase.
The Gadsden Purchase, which was necessary for the trans-contintental railroad, adding the final bit of the US/Mexico border.
