How might a mountain range affect the types of plants and animals found in an area?

The presence of a mountain range could isolate the gene pool of the species which would likely change or mutate characteristics may arise in the species. 

Answer. scale;

Conflicts arising from drug cartels and goverment corruption is an issue that would most likely be considered as mexico's most challenging problem of today. the correct option among all the options that are given in the question is the third option or option "c". this problem has continued for a very long time.