Select

<Select
  defaultValue="placeholder-item"
  helperText="Optional helper text."
  id="select-1"
  invalidText="A valid value is required"
  labelText="Select"
>
  <SelectItem
    text="Choose an option"
    value="placeholder-item"
  />
  <SelectItemGroup
    label="Category 1"
  >
    <SelectItem
      text="Option 1"
      value="option-1"
    />
    <SelectItem
      text="Option 2"
      value="option-2"
    />
  </SelectItemGroup>
  <SelectItemGroup
    label="Category 2"
  >
    <SelectItem
      text="Option 3"
      value="option-3"
    />
    <SelectItem
      text="Option 4"
      value="option-4"
    />
  </SelectItemGroup>
</Select>