**Core Concept**
Excessive eating of non-nutritive substances is a disorder characterized by the consumption of non-food items, leading to potential gastrointestinal and other systemic complications. This behavior is often seen in individuals with underlying psychiatric or neurological conditions.

**Why the Correct Answer is Right**
Pica is a type of eating disorder that involves the consumption of non-food items such as dirt, chalk, or hair. This behavior is often associated with iron deficiency anemia, pregnancy, or certain neurological disorders. The exact mechanism behind pica is unclear, but it is thought to be related to an imbalance in neurotransmitter levels, particularly serotonin and dopamine.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a recognized medical term for excessive eating of non-nutritive substances.
**Option B:** This option may be a distractor, but it is not a specific medical term for the condition described in the question.
**Option C:** This option is not a recognized medical term for excessive eating of non-nutritive substances.

**Clinical Pearl / High-Yield Fact**
Pica is often seen in individuals with intellectual disabilities or those living in poverty, where access to nutritious food may be limited. It is essential to identify and treat any underlying medical conditions that may be contributing to this behavior.

**Correct Answer:** Pica.