**Core Concept**
The otolith organs, specifically the saccule and utricle, are part of the vestibular system in the inner ear. They play a crucial role in detecting linear acceleration and changes in head position, contributing to our sense of balance and spatial orientation.

**Why the Correct Answer is Right**
The otolith organs contain sensory hair cells covered with calcium carbonate crystals called otoliths. As the head moves, the otoliths shift, bending the hair cells and triggering nerve impulses that convey information about linear acceleration and head position to the brain. This information is essential for maintaining balance and preventing falls.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because otolith organs are not responsible for detecting sound or hearing.
* **Option B:** This option is incorrect because the semicircular canals, not the otolith organs, are primarily responsible for detecting rotational movement and angular acceleration.
* **Option C:** This option is incorrect because the cochlea, not the otolith organs, is the primary structure responsible for sound processing and hearing.

**Clinical Pearl / High-Yield Fact**
The vestibular system, including the otolith organs, is responsible for approximately 50% of balance-related information, with the remaining 50% coming from proprioception and visual input.

**Correct Answer: C. Detecting linear acceleration and changes in head position.**