By looking at the diagram, and my knowledge of Punnett squares, i would say B. 4:16
Uranium is not a renewable resource.
Hope this Helps!!!
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.