Which of these is an element of the formal definition of intellectual disability? iq below 70 slower than normal reflexes evidence of brain damage onset of deficits prior to age 6?

The correct answer is IQ below 70.

Explanation:

A usual mental tendency, which comprises planning, reasoning, thinking abstractly, solving issues, learning effectively, understanding complex ideas, and learning from experience is known as intelligence. The intellectual disability in the past has been illustrated by substantial cognitive deficits that have been developed via a standardized determination of intelligence, in specific by significant deficits in adaptive and functional skills and with an IQ score of below 70.