Which of the following is a symptom of chronic neurodevelopment disorders?

Developmental delays are a key symptom of chronic neurodevelopment disorders. These disorders often manifest during the developmental period, typically before the age of 22, and can impact various domains such as cognition, motor skills, and social functioning. Individuals with these disorders may show delays in achieving developmental milestones, such as speaking, walking, or learning. This can affect their ability to perform tasks that are typical for their age group, leading to longer-term challenges as they continue to grow.

In contrast, options like rapid cognitive decline generally indicate a different type of condition, often associated with degenerative disorders rather than neurodevelopmental issues that are present from an early age. Physical disabilities may be associated with some neurodevelopmental disorders but do not represent a core symptom across the spectrum. Seasonal effectiveness does not pertain to neurodevelopmental disorders at all, as it relates more to environmental factors rather than developmental characteristics. Therefore, development delays clearly align with the primary characteristics of chronic neurodevelopmental disorders.