Answer:
The diagonals are perpendicular.
Explanation:
It's important to know that a kite has form of a quadrilateral. Specifically, it has two pair of congruent sides. Also, it has two diagonals which don't bisect each other, because the symmetry of the figure is not like a rectangle.
Additionally, the diagonals intersect perpendicularly.
Therefore, the right answer is the third choice, because it's the only characteristic that belongs to a kite figure.