How did individual cities communicate throughout the large Inca empire? They lit torches that could be seen by the next city.
They tied knots in different colored strings and passed it from city to city.
They wrote letters that were delivered daily.
They sent messages on trained birds.

The answer is They tied knots in different colored strings and passed it from city to city.

Explanation: It's called Quipu.

They tied knots in different colored strings and passed it from city to city.

Explanation:

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .

answer; the candidate for vice president;