How can i write a dropdown in .hbl?

I'm working on a project where I need to do some changes. I want to add a dropdown to present some values in user end. I am new to ember, handlebars, and javascript. Please help me with this. I searched all over google for solutions and I raise this due to I couldn't find a solution.

This is the code,

    
        <p>Find or Test Your Book Idea</p>
        
        
    

This is the rendered interface,

Under "Book or eBook" I want to have a dropdown. How can I achieve this?