how do I can delete the empty option from the dropdown menu?

Last question, how do I can delete the empty option from the drop down
menu? I don’t know how I got those empty spaces.

To clarify, are you referring to this dropdown field in your form https://www.jotform.com/210274491144046?

Unfortunately, this is a default empty option for the dropdown field.

You may however add a text by enabling the "show text in Empty Option" to the dropdown option.