Question

what is a psychological response to stress? difficulty concentrating and irritability. slower digestion. increased heart rate. tightening of muscles.

Explanation:

To determine the psychological response to stress, we analyze each option:

• "Difficulty concentrating and irritability" are psychological symptoms (cognitive and emotional changes) related to stress.
• "Increased heart rate" and "Tightening of muscles" are physical responses.
• "Slower digestion" is also a physical (physiological) response related to the body's stress - induced changes in the digestive system. So the option with psychological responses is "Difficulty concentrating and irritability".

Answer:

Difficulty concentrating and irritability.