Question

fix any errors in the passage below. when youre done, click \submit.\ many civilizations have thrived because of its powerful weapons, abundant natural resources, or savvy leaders. for the incas, however, small pieces of string were equally crucial to their success as an empire. a tool made of knotted wool, called the quipu, allowed the incas, the largest ancient south american civilization, to count their resources and population. for the inca empire, the quipu was a common and important thread throughout their history. the word \quipu\ means \knot\ in quechua the main language of the incas. quipus were made of knotted strings tied together—as few as a handful, or as many as 2,000. these cords were usually spun from the fur of llamas or alpacas, two common animals in the region. interpreting the quipus was no easy task. the system was much more advanced than a simple tally, where one knot represents one person or unit of money. instead, quipus are using a \base 10\ system, just like in modern math. this means that, according to its

Explanation:

1. "its" in the first - sentence should be "their" as it refers to "many civilizations" (plural).
2. "are using" in the last - sentence should be "used" as the Inca civilization is in the past. Also, a comma should be added after "Quechua" to set off the appositive phrase "the main language of the Incas".

Answer:

Many civilizations have thrived because of their powerful weapons, abundant natural resources, or savvy leaders. For the Incas, however, small pieces of string were equally crucial to their success as an empire. A tool made of knotted wool, called the quipu, allowed the Incas, the largest ancient South American civilization, to count their resources and population. For the Inca empire, the quipu was a common and important thread throughout their history.

The word "quipu" means "knot" in Quechua, the main language of the Incas. Quipus were made of knotted strings tied together—as few as a handful, or as many as 2,000. These cords were usually spun from the fur of llamas or alpacas, two common animals in the region.

Interpreting the quipus was no easy task. The system was much more advanced than a simple tally, where one knot represents one person or unit of money. Instead, quipus used a "base 10" system, just like in modern math.