The main Property of check box is . . . . . . . .

check
value
stretch
load picture

The main property of a checkbox is check. A checkbox is a type of input control that allows users to select one or more options from a list. When a checkbox is checked, it indicates that the user has selected that option. The value of a checkbox is either “checked” or “unchecked”.

The other options are not the main properties of a checkbox. Value is the value that is stored in the database when the checkbox is checked. Stretch is a property that allows you to specify how the checkbox should be resized when the window is resized. Load picture is a property that allows you to specify a picture that should be displayed next to the checkbox.