Final answer:
Your mother wants to use negative punishment to reduce your brother's whining.
Step-by-step explanation:
In this example, your mother wants to use negative punishment to reduce your brother's whining.
Negative punishment involves removing a pleasant stimulus to decrease a behavior. In this case, your mother wants to take away your brother's toys whenever he whines, which is a form of negative punishment. By removing the toys, your mother hopes to decrease your brother's whining behavior.