Which form event handler executes the specified code when the value of an element is modified from the default?

The correct choice is the event handler that executes code when the value of an element is modified, which is the onchange event. This event is triggered when an input field loses focus after its value has changed. The onchange event is particularly useful for forms, as it allows you to capture user input once the user moves away from the input field, ensuring that any modifications are processed after the user is done with that input.

For instance, if a user types in a text input field and then clicks outside of it, the onchange event will trigger if the value has changed from its initial state. This behavior is valuable for validating fields, updating other parts of the interface, or performing calculations based on user input.

The other event handlers listed have different purposes:

• The onclick event executes code when an element is clicked, regardless of whether the value of an input has changed.
• The oninput event provides immediate feedback as the value of an input field changes, triggering the event with every keystroke, which is different from waiting for the user to leave the field.
• The onsubmit event is related to form submission and triggers when the form is submitted, rather than when individual elements are modified.

Understanding how each of these event handlers operates clarifies why onchange