Answer:
Value=max(populatio1,population2)
Step-by-step explanation:
Assuming that two int variables, population1 and population2, have already been declared and initialized, we car write the next function:
max(population1,population2)
 if population1 => population2
   then var=population1
   else var=population2
 endif
 return var
This function decides between two values population1 and population 2 and return the value of the larger one.
Note that we can have the option where population1 and population 2 are equal and doesn´t matter if we choose population1 or population2