Which phrase defines altitude?

how tightly molecules are packed

a column of air pushing on an area

the force pushing on an area or a surface

the height of a given point above sea level

Where is the vascular system located

How are the arctic and antarctic circles alike?

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.