Water is an odd substance for one reason: its solid form is one of the only solids that is less dense than its liquid form. This leads water to 'sink'!
Answer:
Urban areas tend to have more sanitation facilities than rural areas
Explanation:
They have a characteristic U shape, with steep, straight sides and a flat or rounded bottom (by contrast, valleys carved by rivers tend to be V-shaped in cross-section). Glaciated valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring.
You can infer that the sand is made of different type of rock than normal beaches because of its color. it could be cooled lava
