Which natural wonders are volcanic, or formed by volcanic activity? Choose two correct answers. Mount Kilimanjaro
Nile River
Ngorongoro Crater
Okavango Delta
Red Sea Reef
Sahara Desert
Serengeti

"neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the united states, or any place subject to their jurisdiction." - the thirteenth amendment to the united states constitution, 1865 which statement describes the effect that the thirteenth amendment had on american society? a) male freedmen were given the right to vote. b) slavery was made illegal in the united states. c) ex-slaves were given united states citizenship. d) southern states were no longer allowed to use convicts as labor.