Why was the death of darius important to alexander's conquest of persia?

Darius was the Persian king; it was necessary for Alexander to remove the Persian head so that he  could rule over the Persian body.

Explanation:

answer; ok in rural area most people depend on private transportation(cars),pick up truck,donkey and buggy: ),and urban people can walk or ride public transportation,bus,train cab,uber.

yes

it is because 3 because the citizen the northern democratic party watned the warning on red to blue because it is purple. lol