Aspirin is beneficial to patients suspected of having a heart attack because it:

Aspirin is being prescribed to patients that are suspected of having a heart attack because aspirin can prevent the grouping of platelets. Aspirin are prescribed to patients who had a stroke or heart attack, those patients that are high risks of having a heart attack, patients who are diabetic that can lead to have a heart disease. Aspirin can be taken as long as the patient is not allergic to this medicine. 

the trait of personality falls in the middle of the diagram because personality is a mixture of ones nature and environment.