Answer:
A mass movement can either be slow or rapid. The slow downward movement of materials in a slope is called creep. This happens when the soil loosens up because of water and burrowing animals. In contrast to this, the rapid movement of large materials in a slope is called landslide.
Human because human is the only organism on the list!
the tail bone connects to the spine :)
What pair of integers? You haven't provided any.
