Necessity tend to have__
demands, whereas Luxuries have___
demand​

The study of where things are 

Increasing the release of greenhouse gases and pollution

Its led to migrationits led to death 

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.