How to add a drop down menu with html and CSS

Answer 1

This is a basic drop down list without any style
<select>
<option>1</option>
<option>2</option>
<option>3</option>
</select>

Answer 2

Not just html you will also need css.

Answer 3

https://code.sololearn.com/WV5yAMqEKnO0/?ref=app

https://code.sololearn.com/W4j0UbyzvIDI/?ref=app