Many different native american groups existed because
•there were many different lenvironmental /geographical conditions
•plains
•hunting for food was an important activity
•native american indians worshiped many gods

there were many different environmental /geographical conditions

Explanation:

martin luther king (1929-1968) was an activist for the african american rights, mr. king has a profile of a kind leader that built a tenacity, respect and full of hope future. he was an activist through civil disobedience and no violence pressure mechanisms. he tried to build a more egalitarian and fair society. his efforts carried a reivindication message of the civilian rights to every west corners. for that reason, he won the nobel prize in 1964.