Final answer:
The HHPS danger, poisonous symbol on a label indicates a potentially hazardous substance, like toilet bowl cleaner, which often contains strong bases that can cause chemical burns.
Step-by-step explanation:
The HHPS danger, poisonous symbol on a label indicates a potentially hazardous substance. In this case, the correct answer is d. toilet bowl cleaner. Toilet bowl cleaners often contain strong bases, such as sodium hydroxide, which can cause chemical burns and harm organisms. It is important to handle these substances with caution and follow the safety instructions on the label.