Crossing a European border required neither paperwork or government approval
They are a positive demonstration of how to treat your elders w respect. The unproven yet popularly believed invention of karate was a very positive social influence, as it not only teaches a sport, but manners, etiquette, self esteem, respect for others, & many more qualities I feel are important socially. They have produced many great musicians who have contributed to classical music.
City-states came first , hope thats helps :)
Answer:
A. To irrigate the land and sell crops
Explanation:
To divert rivers and streams is an irrigation system used since the antiquity to irrigate crops and to extend the sowing areas, now the difficulty of water access and the low rainfall in Texas obligate them to use that system to avoid crop losses and to improve the production capacity, in consequence, to earn the most quantity of money per crop with the minimun investment and expenses.