Answer: hostility
Step-by-step explanation:
Type A behavior is associated with temperament characterization which includes the features like aggression, impatience, focus upon quantity over quality, competitiveness and unrealistic sense of urgency. These features are likely to exert a negative influence over the heart and brain of a person. These features are expected to cause coronary heart diseases and mental stress-related problems.
Hostility is one of the types A personality feature. The hostile person is aggressive, unfriendly and angry. Such a person has unrealistic or unfair attitude towards others. Hostility is the toxic ingredient in type A behavior. A person with hostile behavior is expected to be affected by coronary heart disease and other health-related problems in males as well as in females.