**Core Concept**
The hypoglossal nerve is the twelfth cranial nerve responsible for controlling the motor functions of the tongue, including protrusion, retraction, and movements during speech and swallowing. It is a mixed nerve that also carries some sensory fibers from the tongue.

**Why the Correct Answer is Right**
Hypoglossal nerve paralysis results in weakness or paralysis of the tongue muscles, leading to difficulties in speaking, swallowing, and articulation. The primary symptom is a deviation of the tongue towards the side of the lesion during protrusion, due to the unopposed action of the intact muscles on the opposite side. This is because the hypoglossal nerve innervates all the extrinsic and intrinsic muscles of the tongue, except for the palatoglossus muscle which is innervated by the vagus nerve.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the hypoglossal nerve does not provide motor innervation to the palate or the pharynx. The muscles of the palate are innervated by the vagus nerve and the pharyngeal muscles are innervated by the pharyngeal plexus.

**Option B:** This option is incorrect because the hypoglossal nerve is not responsible for controlling the muscles of the larynx. The laryngeal muscles are innervated by the vagus nerve and the accessory nerve.

**Option C:** This option is incorrect because the hypoglossal nerve does not provide sensory innervation to the ear. The sensory innervation of the ear is provided by the trigeminal nerve and the facial nerve.

**Option D:** This option is incorrect because the hypoglossal nerve does not provide motor innervation to the muscles of the face. The muscles of the face are innervated by the facial nerve.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the hypoglossal nerve is a mixed nerve that carries some sensory fibers from the tongue, which can be tested by examining the patient's ability to localize a touch on the tongue.

**Correct Answer:** A.