**Core Concept**
Flooding is a type of exposure therapy used to treat anxiety disorders, such as phobias and post-traumatic stress disorder (PTSD). It involves the patient being exposed to the feared stimulus or situation in a controlled environment, without any relaxation techniques or avoidance.

**Why the Correct Answer is Right**
Flooding is based on the concept of habituation, where the patient's anxiety response to the feared stimulus decreases over time due to repeated exposure. The goal of flooding is to help the patient become desensitized to the feared stimulus and eventually learn to cope with it. This technique is often used in combination with other forms of therapy, such as cognitive-behavioral therapy (CBT), to help patients overcome their anxiety disorders.

**Why Each Wrong Option is Incorrect**
**Option A:** Social learning theory is a concept in psychology that explains how people learn new behaviors by observing and imitating others, but it is not directly related to flooding as a treatment modality.

**Option B:** Systematic desensitization is a type of exposure therapy that involves gradual exposure to the feared stimulus, starting from the least anxiety-provoking situation and progressing to more anxiety-provoking ones. While it is a related concept to flooding, it is not the same thing.

**Option C:** Cognitive restructuring is a technique used in CBT to help patients identify and challenge negative thought patterns, but it is not a treatment modality that involves exposure to feared stimuli.

**Option D:** Psychodynamic therapy is a type of psychotherapy that focuses on exploring unconscious thoughts and feelings that underlie a person's behavior, but it is not directly related to flooding as a treatment modality.

**Clinical Pearl / High-Yield Fact**
Remember that flooding should only be used under the guidance of a trained therapist, as it can be a distressing and potentially triggering experience for some patients.

**Correct Answer: C. Flooding is a type of exposure therapy used to treat anxiety disorders.**