Does any one do biology cus i need help on meiosis

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above

What is the one part of the nucleotide  that differs among the other different nucle  tides?

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?