Can anyone name the rarest and most endangered animal?

Which of the following is an example of relocation diffusion

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.

Abird flies at a speed of 75 metres per second for 15 seconds, how far does the bird fly