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>
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