Question

Which forms when a larger volcano collapses in on itself? O A. Tsunami O B. Tephra C. Lava dome D. Caldera​

Answer 1

Answer:

D. Caldera

Explanation:

Caldera

(noun)

a large volcanic crater, especially one formed by major eruption leading to the collapse of the mouth of the volcano.

Your answer would be as said above *Caldera*