Which of the following answers best describes the downhill movement of rocks or soil because of the pull of gravity? A. sand dune
B. moraine
C. mass wasting
D. none of the answer are correct
Please help

(1) which phrase describes an important agricultural change that occurred during the mississippian period? (a) first cultivation of wild grains (b) expansion of marsh elder farming (c) spread of corn agriculture (d) gathering of nuts and berries (2) which group of native americans use northwestern arkansas as it’s traditional hunting grounds? (a) osage (b) quapaw (c) woodland (d) caddo

Which of the following best describes the economy of africa?

What happens to rock when acid reacts with it?