<!DOCTYPE html> <html> <head> <style> div h1 { font-size: 21px; } </style> </head> <body> <div> <p> </p><h1>This element is selected because it is a descendant to the <div> element. (font size = 21px). </div> <h1>This element is not selected, not a descendant to <div> element. </div></h1></h1></div></body> </html>