jack, jim, and justin all have intellectual disabilities. jack's mother was a chronic alcoholic. jim's mother beat him on the head repeatedly when he was an infant. justin was born prematurely and suffered from a lack of oxygen at birth. the cause of intellectual disabilities for all three boys is due to

Non genetic biological factors

Explanation:

Neither Jack Jim or Justine are disabled intellectually because of their genes, outside forces caused their issues and as such they are not genetic.

The cause of intellectual disabilities for all three boys is due to Acquired intellectual deficiencies (external causes and not for genetics).

Explanation:

It is a condition diagnosed before the age of 18 that includes a general intellectual functioning below average and a lack of the necessary skills for daily life.

The causes of intellectual disability may include:

answer; (true);