<p>Choose your monster's features:</p>

<div>
  <input type="checkbox" id="scales" name="scales"
         checked>
  <label for="scales">Scales</label>
</div>

<div>
  <input type="checkbox" id="horns" name="horns">
  <label for="horns">Horns</label>
</div>

p,
label {
    font: 1rem 'Fira Sans', sans-serif;
}

input {
    margin: .4rem;
}