Which method is used to delete a child object of a parent element?

The method used to delete a child object of a parent element is 'removeChild()'. This method is a part of the DOM (Document Object Model) API in JavaScript and is specifically designed to remove a specified child node from a parent node.

When you call the 'removeChild()' method, you need to pass it the reference to the child node you wish to remove. The method then removes that node from the DOM and returns it, allowing you to handle or manipulate the removed node if required.

For example:

let parent = document.getElementById('parent');
let child = document.getElementById('child');
parent.removeChild(child);

In this snippet, the 'child' element will be removed from the 'parent' element, effectively altering the structure of the document.

The other choices do not correspond to valid methods for removing child nodes. 'remove()' is a valid method available on DOM elements, but it removes the element itself without needing to specify a parent. 'deleteChild()' and 'discardChild()' are not methods that exist in JavaScript's DOM API, making them invalid choices for this question.