Final answer:
The appropriate angle that fills the blank is 60 degrees (d).
Step-by-step explanation:
In the given information, we have two transversals: CF and zADE. Corresponding angles are formed when a transversal intersects two parallel lines.
Therefore, the corresponding angles are equal. Since the question asks for the angle that fills the blank, we need to identify the angle that corresponds to the given transversals.
Since the corresponding angles are equal, the appropriate angle would be the one that is equal to zADE. Therefore, the answer is 60 degrees (d).