Answer: A property
Explanation:
A form's height is a property as the height is the form is one of the basic property of the form. The form size, height and width all comes under its property.
As, the height of the form represented the basic feature that the form is small or large in heights.We can measure the height of any object and substance from bottom to the top.
On the other hand, an event and a method are incorrect as, it does not indicate the form's height. Therefore, a property is the correct option.
