Final answer:
The disorder characterized by not meeting developmental milestones due to intellectual disabilities is known as Intellectual Developmental Disorder. Autism Spectrum Disorder (ASD) is a separate neurodevelopmental disorder with a spectrum of symptoms affecting social interaction and communication abilities.
Step-by-step explanation:
The disorder characterized by intellectual disabilities in which the person does not meet normal developmental milestones is a. Intellectual developmental disorder. Intellectual developmental disorder is a condition wherein individuals experience impaired cognitive functioning and skills, including deficits in intellectual functioning and adaptive behavior, which presents during the developmental period.
Conversely, the condition known as Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder characterized by a spectrum of symptoms. ASD can involve challenges in social interaction, communication, repetitive behaviors, and may be accompanied by unique strengths and differences. Some individuals with ASD have cognitive disruption, while others may have normal to high intelligence. ASD's symptoms can range widely, with some individuals requiring significant support in their daily lives, and others living independently.
When a child shows signs such as difficulty making eye contact or reading social cues, they may be evaluated for ASD as these are characteristic symptoms of the disorder. Moreover, children with ASD might engage in repetitive behaviors and have strict adherence to certain rituals. It is crucial to recognize that ASD is a spectrum, and as such, it represents a wide range of potential abilities and challenges.