Final answer:
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by impaired social interaction and communication abilities. It is also associated with eccentric thoughts, perceptions, and behaviors, as well as repetitive motor behaviors, strict adherence to certain rituals, and preoccupation with specific subjects.
Step-by-step explanation:
The subject of this question is autism spectrum disorder (ASD). ASD is a neurodevelopmental disorder characterized by impaired social interaction and communication abilities, as well as eccentric thoughts, perceptions, and behaviors. People with ASD often have very few close relationships and may also exhibit repetitive motor behaviors, strict adherence to certain rituals, and preoccupation with specific subjects.