Historians have proposed many theories about what caused the end of Maya civilization. In one sentence each, summarize the four theories you learned in this unit. Circle the one you think is most likely. Add a sentence explaining your reasoning. Text to speech

answer; /// the above statement is (

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: