Leticia is trying to lift a box using the least amount of force. Which lever should she use? Group of answer choices. (this is science)

A. lever
B. screw
C. pulley
D. inclined pline

What factors led to europe's global dominance in economic and political factors? what impacts did that dominance have on other peoples and environments?

These factors threaten north americas ecosystems

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.