Hello [email protected],
Thanks for your question in regards to creating a drop-down. Unfortunately, this question is a very general one, so we will need a lot more detail in order to give you the information that you require. Can you tell us if you're building the website in a particular application (e.g. WordPress, Joomla,etc.)? This would go a long way in helping us provide an accurate answer. If you need generic information about creating drop-down menus in HTML, you can use this link.
If you have any further questions or comments, please let us know.