How to show name field based on user response to dropdown element?

I am trying to use quantity number 1-4 but would like when I select the number 1 from Dropdown it prompts me to add a name. Can you please assist me.

You can use hide/show conditional logic for that, please check the guide below.

Guide: How-to-Show-or-Hide-Fields-Base-on-User-s-Answer

Please check this demo form: https://form.jotform.com/92358152241958

You can clone that to inspect or to know how it was done: How-to-Clone-an-Existing-Form-from-a-URL