<!DOCTYPE html> <html lang="en"> <head> <title> CSS Id Selector </title> <meta charset="UTF-8"> <style> #para1 { color: green; text-align: center; } </style> </head> <body> <p id="para1"> Hello World! (This paragraph is affected by style). </p> <p> This paragraph is not affected by the style. </p> </body> </html>
