I have a child who is disrespectful

I have a child who is disrespectful.
God does not mince words regarding the seriousness of disrespect, because it denotes a growing disregard for authority. This includes non-verbal communication as well (rolling of the eyes, shrugging shoulders, slamming doors, stomping off, pouting, tone of voice, etc.). If disrespect is left unchecked, eventually, the child will completely disregard those in authority. The minute a parent hears or sees disrespect from his/her child, it should immediately be dealt with and dealt with firmly. If it is a little child, put the child in a time out or spank him. If he is bigger, take away a privilege.