Final answer:
If EDE is the perpendicular bisector of AB in quadrilateral ABCD, it indicates that ABCD is a parallelogram.
Step-by-step explanation:
If EDE is the perpendicular bisector of AB, it means that AB is divided into two equal halves and the line EDE is perpendicular to AB. In a quadrilateral, if a line bisects one pair of opposite sides and is perpendicular to them, then it is a parallelogram. Therefore, the correct answer is 1) It is a parallelogram.