I faild in two issue when i test the project. and i don't understand. how to fix them?what does

I failed in two issues when I test the project. and I don’t understand. how to fix them?
how I fix Them here is my code.

@solWeb, run your HTML code through the W3C validator. Just copy your HTML and paste it into the ‘Validate by Direct Input’ tab. Cleaning up the warnings will help you to pass tests.
After fixing that, click on the red button and it will tell you why the one remaining test is failing. It’s self explanatory.