Mangga baca bagian di handap ieu, tuluy ngajawab patarosan di handap ieu dina basa nu sarua jeung bagian: Passage: A lava tube is a natural conduit formed by flowing lava which moves under the hardened surface of a lava flow. Pipa bisa ngurangan lava ti gunung seuneuan salila hiji letusan, atawa bisa jadi paeh, hartina aliran lava geus ceased, jeung batu geus tiis sarta ninggalkeun guha panjang. Patarosan: Lamun hiji lava tube geus paeh naon hartina pikeun aliran lava?
aliran lava geus ceased