<form>
<label for="dog">Dog:</label><input type="checkbox" id="dog" value="dog"/>
<label for="cat">Cat:</label><input type="checkbox" id="cat" value="cat"/>
<label for="hedgehog">Hedgehog:</label><input type="checkbox" id="hedgehog" value="hedgehog"/>
<label for="yak">Yak:</label><input type="checkbox" id="yak" value="yak"/>
</form>