From observing the figure, where do rockfalls and rock slides commonly occur? Need a Hint?

in the desert
on the prairie
near a streambed
areas with steep cliffs

d. groundwater flows through the subsoil and deposits minerals.

b a mature ovary of a plant.

me and my friend did 2

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.