Best explains why the maya built cisterns

The answer is - droughts.

The region in which the Maya civilization existed, even though in general had a stable climate throughout the year, occasionally, on every few years, was experiencing a long drought. The droughts in this period of time could have been fatal because they were destroying much of the plants that were providing food for the people, and also lack of freshwater. So the Maya came out with a smart method, they started to build cisterns, and when there was rain the cisterns were filled with water that can be used later on when there's crises for it.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

answer: fact: italy has over 300 islands ranging from extremely small uninhabited islands to the huge island of sicily.

explanation:

opinion: italy has way to many islands