When a sea star strives to get near an urchin, the urchin moves its spines aside and lets the sea star's arm get really close. Then the pincers chomp on the sea star's tube feet. The sea star immediately backs off. However, purple sea urchins' pincers can't defend against sunflower stars. If a sunflower star approaches, an urchin waves its spines and pincers and retreats. If the urchin doesn't move away fast enough, the sunflower star swallows the urchin whole.
Interpersonal therapy: A form of psychotherapy in which the focus is on a patient's relationships with peers and family members and the way they see themselves.Interpersonal psychotherapy (IPT) is based on exploring issues in relationships with other people.nterpersonal therapy: A form of psychotherapy in which the focus is on a patient's relationships with peers and family members and the way they see themselves.
Interpersonal therapy focuses on the interpersonal relationships of the depressed person. The idea of interpersonal therapy is that depression can be treated by improving the communication patterns and how people relate to others. Techniques of interpersonal therapy include: 1  Identification of Emotion â Helping the person identify what their emotion is and where it is coming from. Example â Roger is upset and fighting with his wife. 2  Expression of Emotion â This involves helping the person express their emotions in a healthy way.