Did the southern states have Constitutional authority to secede?

Which of the following led to a continuation of the treatment in the excerpt above? a)the brutality of the trans-atlantic african slave trade. b)spanish repression after violent native uprisings in new spain during the 16th century. c)european competition to quickly establish colonial holdings in the new world. d)the reliance of the spanish on native americans to provide labor under the encomienda system.

Mayan people were known for participating in which of the following activities? road construction stargazing storytelling quipu weaving

Overpopulation puts severe stress on the environment because .