Place the appropriate valve position for the atrioventricular valves (av) and semilunar valves for each phase of the cardiac cycle on the left side of the heart. identify the valves’ positions by dragging the appropriate labels to their respective targets.

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation: