Coral Reefs Are

question 32

Multiple Choice

Coral reefs are

• A) shells of Mollusca that have been converted to rock by geological processes.
• B) hard external skeletons secreted by coral animals (Cnidaria).
• C) marine rocks that often are used as attachment places by Cnidaria.
• D) hardened sugars that are secreted by algae.

---

Definitions:

ECT

Electroconvulsive Therapy is a medical treatment most commonly used for patients with severe major depression or bipolar disorder that has not responded to other treatments.

Major Depression

A psychiatric disorder characterized by a persistent feeling of sadness or a lack of interest in external stimuli, impacting daily functioning.

Schizophrenia

A long-term mental disorder involving a breakdown in the relation between thought, emotion, and behavior, leading to faulty perception and withdrawal from reality.

DSM-5

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, a handbook used by healthcare professionals in the United States and much of the world as the authoritative guide to the diagnosis of mental disorders.