Can anyone tell me about the autism?

Autism is a lifelong, nonprogressive neurological disorder typically appearing before the age of three years

Explanation:

The word “autism” means a developmental disability significantly affecting verbal and non-vAutism spectrum disorder (ASD) is a complex developmental condition that involves persistent challenges in social interaction, speech and nonverbal communication, and restricted/repetitive behaviors. The effects of ASD and the severity of symptoms are different in each person.erbal communication and social interaction.

where's the excerpt?   also i think the answer is the last one