Identify the range of the function shown in the graph

The range is the possible values of  the function 
AS you see on the graph it ranges from 0 to 8

Its choice B.

If y=f(x) is the function, then

the domain of the function are all possible values of variable x;the range of the function are all possible values of variable y.

From the graph you can see that

the domain is (if you draw verical lines, they will intersect the graph only for );the range is (if you draw horizontal lines, they will intersect the graph only for ).

correct choice is B.