We can conclude that the correct option is the first one:
The models show that 2/6 is equivalent to 1/3 because both models have the same area shaded.
We can see that both shaded areas are the same, so 2/6 is equivalent to 1/3.
We can also do as follows, algebraically, to check this:
(We can also see that both models do not have the same number of parts shaded: in the first case, we have 2 shaded parts of 6, and, in the second, 1 of 3.)
Therefore, the correct option is the first one (as described above).