The correct asnwer to your question - why would a group of antelopes leave the herd for search of a better grassland is an example of emigration - B.
These antelopes would emigrate to a certain grassland and be immigrants in that grassland. This has to be distinguished.
Damage to your kidneys can cause wastes to build up in your body and lead to other health problems like heart disease , anemia,and bone disease. Also you can die without your kidneys
