How did the smaller Mayan city-states defend themselves against the more powerful city-states? They traded valuable resources for protection. They made military alliances with larger city-states. They built walls around their cities to keep out invaders. They avoided conflict by maintaining peaceful relationships. im taking a test pls help im timed too.

Do some research to further analyze the impact of the industrial revolution. look for information that describes both the positive and negative effects of the industrial revolution. you can use the websites listed below to conduct your research. the first three websites provide descriptions of working conditions during the industrial revolution. the last website describes technological advances of the era. if you like, look for other sites that provide information on the topic.1. 2. 3. ~histwhs/h114.dir/h114.webreader/h1 14.read. m.mines. html4.