Can anyone help me to make a dropdown menu

Answer 1

https://code.sololearn.com/W48F1CWI15we/?ref=app
https://code.sololearn.com/Wx8DsUqH54z2/?ref=app
https://code.sololearn.com/WXN9k82eQs7Y/?ref=app

Answer 2

Visit https://w3schools.com

There is a special section for such needs.
And my suggestion is that you should dig on the internet for your needs first.

I just want to say this, "Independence should be your identity"