Final answer:
Intellectual and developmental disabilities can be caused by neurodevelopmental disorders and learning disabilities. Neurodevelopmental disorders disrupt the development of the nervous system and can cause intellectual deficits, communication difficulties, and motor impairments. Learning disabilities are specific neurological impairments that affect certain areas of learning.
Step-by-step explanation:
One factor is neurodevelopmental disorders, which occur when there is a disruption in the development of the nervous system. These disorders can cause intellectual deficits, communication difficulties, and motor impairments.
Examples of neurodevelopmental disorders include Down syndrome, autism spectrum disorder, and attention deficit/hyperactivity disorder. Another factor is learning disabilities, which are specific neurological impairments that affect certain areas of learning, such as dyslexia, dysgraphia, and dyscalculia. It is important to note that learning disabilities are not related to intelligence levels.