It is now believed that the largest contributing factor to the decline of the Indus Valley civilization was an outbreak of disease--since there were no treatments and the density of the civilization led the disease to spread very quickly.
The Answer is B
... Brazil
From 450,000 to possibly 650,000. i hope this helps. :-)
Answer:
They linked canals with the river.
Explanation:
In 1832, the government of Ohio dig canals about 309 miles and linked these canals with the Ohio River which speedup Ohio's economic growth because transportation system was improved and goods were easily transported to other countries. Transportation plays a vital role in the economy of a country if transportation is expensive so people avoid sending goods to other regions and less money was earned by the country due to less exports.
