Code
bootstrap
<form class="row g-3 needs-validation" novalidate>
<div class="col-md-6">
<label for="email" class="form-label">Email</label>
<input type="email" class="form-control" id="email" required>
<div class="invalid-feedback">Please enter a valid email.</div>
</div>
<div class="col-md-6">
<label class="form-label">Select</label>
<select class="form-select">
<option selected>Choose...</option>
<option value="1">One</option>
</select>
</div>
<div class="col-12">
<div class="form-check">
<input class="form-check-input" type="checkbox" id="agree">
<label class="form-check-label" for="agree">Agree to terms</label>
</div>
</div>
<div class="col-12">
<button class="btn btn-success" type="submit">Submit</button>
</div>
</form>