Final answer:
When a 3-year-old is not speaking intelligibly but has normal hearing, parents may be concerned about autism. However, language development varies among children, and it's important to consult with a healthcare professional for guidance.
Step-by-step explanation:
When a 3-year-old is not speaking intelligibly but has normal hearing, it is understandable that parents might be concerned about autism. However, it's important to note that language development varies among children. At this age, children typically start speaking in short sentences, asking questions, and learning new words. They may also have imaginary companions and show preferences for toys or foods. It would be a good idea for parents to consult with a healthcare professional to address their concerns and determine the best course of action.