No one website has all of this information.
You'll either need to read your book or Google each of these questions separately.
Is there a good website for me to find: The Maya's Reason for Decline, The Aztec's Location, Lauguage, Ruler/Type of Goverment, Religion/Beliefs/Society, Achievements, Reason for Decline & The Inca's Location, Lauguage, Ruler/Type of Goverment, Religion/Beliefs/Society, Achievements, Reason for Decline.
Please
All I need is a webiste for it.
2 answers
Three reason why the native American population decline when the Spanishmade contact with them