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<!DOCTYPE html> <html> <head> <title>#id selector</title> <style> #sec1 { color:green; text-align:center; } #sec2 { color:red; text-align:center; } </style> </head> <body> <!-- id attribute declare here --> <h1 id = "sec1">Welcome to css Tutorial</h1> <h2 id = "sec2">#id selector</h2> </body> </html>