The effects of acid rain are most clearly seen in the aquatic, or water, environments. For an example, streams, lakes, and marshes.Acid rain flows to streams, lakes, and marshes after falling on fields, forest, roads, and buildings. Acid rain also directly falls on aquatic habits.
In urban areas, there are more people, therefore not a lot of farmland. (that eliminates C) If city buildings don't allow flood waters to recede, that could be dangerous in many ways. (So A is still a reasonable answer) If most cities are built in flood zones, there should be some form of shelter if houses aren't safe. Pollutants and diseases being carried in water are already dangerous, but easier to spread with rapid flood waters that are sweeping everywhere. So your best answer would be either A or B.
It depends on the mass of the ice,temperature around it and latent heat energy required to melt the ice.
However the furthest a ice berg can travel is estimately 32-40°n/s
What is involved in the sacred pipe ritual performed during the sun dance ceremony?
A.
individual purification in a sweat lodge
B.
offering of prayers to the four directions, the Earth, and the sky
C.
healing of people through the use of sacred objects
D.
dancing to drumbeats while facing the sun