Instructions:

Articulator: tip of the tongue

Point of Articulation: alveolar ridge

Manner of Articulation: Trill – When the air from the lungs goes over the articulator, which is positioned close to (but not touching) the point of articulation, vibrations occur between the articulator and the point of articulation.

Voice: voiced – Vocal folds are close and vibrating.

Occurrence:
Arabic, Dutch, English (Scottish), French (southern France and Corsica), German (some dialects), Hindi, Italian, Malay (Standard), Russian, Spanish
(Source: https://en.wikipedia.org/wiki/Alveolar_trill#Occurrence)