Why is protected water usually safer to drink than unprotected water from wells or rivers

The layers of earth are based on what two sets of characteristics?

This phrase from the declaration of independence and its primary author thomas jefferson can be used to justify which statement? a) jefferson thought this document could be used in his defense were he put on trial for treason. b) jefferson knew that the colonists' actions would have an international impact. c) jefferson believed that a bill of rights was necessary in the new government. d) jefferson was trying to show the king that the colonists were intellectuals.

Major river of southeast asia flowing through laos thailand vietnam and cambodia