Question

a long deep passage through which lava travels i​

Answer 1

Answer:

Lava tubes are natural conduits through which lava travels beneath the surface of a lava flow. Tubes form by the crusting over of lava channels and pahoehoe flows (Figure 15). During long-lived eruptions, lava flows tend to become channeled into a few main streams.

Answer 2

Answer:

lava tubes

Explanation:

Lava tubes are natural conduits through which lava travels beneath the surface of a lava flow. Tubes form by the crusting over of lava channels and pahoehoe flows.