Ned's parents got divorced when he was seven years old. Ned's older sister vividly remembers the frequent, loud screaming matches between her mother and father in the weeks prior to the divorce, but Ned claims that he has no memories of his parents ever fighting. If Ned has unconsciously blocked awareness of those painful memories, it would be an example of:

It would be an example of repressed memory

Explanation:

Repressed memory is psychological phenomenon in which memories of traumatic events which someone experienced while growing up may be stored in the unconscious mind and blocked from normal conscious recall.

Just like Ned claims that he had no memories of his parents ever fighting, he simply blocked those painful memories inorder not to remember them knowing fully well what it is- a very painful memory.

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision

in an absolute  monarchy, the  monarchrules as an autocrat, with absolutepower  over the state and government — for example, the right to rule by decree, promulgate laws, and impose punishments. the  monarch isnominally sovereign but the electorate, through their legislature, exercise political sovereignty.