Instructions:

Articulator: root of the tongue

Point of Articulation: back of the pharynx

Manner of Articulation: Fricative: The articulator makes a narrow constriction against the point of articulation, so when the airflow goes through the oral passage, audible frication noise is created.

Voice: voiceless – Vocal folds are apart and are not vibrating.

Occurrence:
Abaza, Abkhaz, Adyghe, Agul, Arabic (Standard), Archi, Avar, Berber (Kabyle), Chechen, English (some speakers of Received Pronunciation), Finnish, Galician (some dialects), Hebrew, Kabardian, Kurdish (some speakers), Maltese (Standard), Nuu-chah-nulth, Sioux (Nakota), Somali, Syriac (Chaldean Neo-Aramaic), Ukrainian.
(Source: https://en.wikipedia.org/wiki/Voiceless_pharyngeal_fricative#Occurrence)