Which of the following describes pica?

Pica is characterized by the compulsive consumption of nonnutritive items, which are substances that do not provide any nutritional value. This can include an array of items such as clay, dirt, chalk, or ice. Individuals experiencing pica may eat these substances for various reasons, including nutritional deficiencies, cultural practices, or psychological factors. While the other choices relate to different aspects of eating behaviors and dietary practices, they do not accurately describe pica, which specifically involves the ingestion of nonfood items. Understanding pica is important as it can lead to health complications, depending on what substances are being consumed.