In the study of clinical psychology, anxiety disorders are a significant area of focus. These disorders are characterized by excessive fear or worry that can interfere with daily activities. Among the various types of anxiety disorders, there is one that is primarily defined by a strong, irrational fear of a specific object or situation. This type of disorder can lead to avoidance behaviors, and individuals may go to great lengths to avoid the feared object or situation. What is this type of anxiety disorder called?