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<html><head><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script><script>function changeSize() { $(this).animate({fontSize: "+=3px"});}function changeSpacing() { $(this).animate({letterSpacing: "+=2px"});}$(document).ready(function(){ $("body").delegate("p", "click", changeSize); $("body").delegate("p", "click", changeSpacing); $("button").click(function(){ $("body").undelegate("p", "click", changeSize); });});</script></head><body><p>This is a paragraph.</p><p>This is another paragraph.</p><p>Click any p element to increase size and letterspacing.</p><button>Remove the event handler changeSize() for all p elements</button></body></html>