The math sentence is read "n is greater than minus three." This means the solution shown on the number line will be all numbers to the right of -3.
Because the sentence reads "is greater than" (as opposed to "is greater than or equal to"), the mark at -3 will be an open circle (as opposed to a filled-in circle).
The picture showing an open circle at -3 and including all numbers to the right of that point is ...
the first one.