Ever since zack suffered a brain injury by falling from a ladder, his wife has continued to tell the doctor that his personality has changed. he used to be fun loving and carefree, but he is now more critical and yells at his children for seemingly little reason. zack is likely to have suffered damage to the lobe of his cortex. a. occipital lobe.
b. parietal lobe.
c. temporal lobe.
d. frontal lobe.

d. frontal lobe.                          

Explanation:

Frontal lobe: The term frontal lobe is one of the parts of the brain which is responsible for controlling an individual's cognitive skills, for example, problem-solving, judgement, language, memory, emotional expression, and sexual behaviors. It is often denoted as the control panel of an individual's communication ability and personality.

If the frontal lobe of an individual gets injured, then his or her capabilities to recognize consequences and making good choices are being impaired. It increases irritability that can lead to change in the mood of the person and hinders behavior.

In the question above, Zack is likely to have suffered damage to the frontal lobe of his cortex.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.