It is the major sight of water absorption.
Yes, it could be.
But there are also many other things it could be the result of.
Explanation:
What happens during daytime is, oxygen that gets trapped between filaments of algae, moves them to the surface and during night as O2 is not produced, they slowly sink to lower depths, and you don't see them
A mass movement that involves the sudden movement of a block of material along a flat, inclined surface is called a SLIDE.
speed = distance/ time
Sally's speed = 200m / 39 s = 5.13 ms^-1
