Answer: Third Option
-3, -1, 1
Explanation:
By definition, the zeros of a function f(x) are all the values x for which f(x) = 0.
In other words, the zeros of a function f(x) are the intersections of the graph of f(x) with the axis of x.
Therefore, to identify the zeros of the function shown, identify the values of x in which the graph intersects the horizontal axis.
You can see in the graph that these intersections occur in

Finally the zeros are: -3, -1, 1