Check out example codes for "html form select". It will help you in understanding the concepts better.

Code Example 1

<!-- O segundo valor estará selecionado inicialmente -->
<select name="select">
  <option value="valor1">Valor 1</option> 
  <option value="valor2" selected>Valor 2</option>
  <option value="valor3">Valor 3</option>
</select>

Code Example 2

<label for="cars">Choose a car:</label>

<select id="cars">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>

Code Example 3

<!-- Answer to: "html drop down list" -->

<label for="items">Choose an item:</label>

<!-- The value for `for=""` and `id=""` has to be same. -->

<select id="items">
  <option value="item-1">Item 1</option>
  <option value="item-2">Item 2</option>
  <option value="item-3">Item 3</option>
  <option value="item-4">Item 4</option>
</select>

Learn ReactJs, React Native from akashmittal.com