The amount of oxygen in the air is kept roughly constant by the process called. 1)respiration 2) photosynthesis 3) osmosis

(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

The capital of australia was located a. on a south-facing harbor d. between its two largest cities g. near the great barrier reef j. close to asia

Based on the information in the graph, what can you conclude about humans in the world in general?