Why are farmers today less successful than the Incas? How have modern farmed in the region adopted Incan farming methods?

Ahill is made of rock particles of different sizes. which of these agents of erosion probably causes the hill to form? a- waves b- glacial ice c- wind d- flowing water

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

Fossils of glossopteris, an extinct fern, were discovered on which continents to support the theory of continental drift? check all that apply.