Yes you can as long as you use a product that’s freeze/thaw stable. Keep in mind slip resistance as well
Laminate does have a different sound when you walk on it, however, there are acoustical underlayments available that deaden the echo and make it sound much more like a real hardwood floor. Make sure to voice your concern so the appropriate underlayment is used in the installation process.
Yes there are loop products that have enhanced backings designed to prevent the fiber from running.