"getElementsByTagName()" is the correct answer for the above question.
Explanation:
The above-defined function is a javascript function, which is used to give the references for any element. The element can access by the help of the tag name.
The above function matches the specified argument tag with all the tag in the HTML document and catches that element which matches fits.
Just for example if a html elemnt holds a list ement which is written in html as <li>, then the above defined function can call its by the help of "getElementsByTagName("li")".
The above question asked about a method that is used to reference any element of the HTML. Hence getElementsByTagName() is the correct answer.
