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

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*

answer; the correct answer is ( north and west );

answer; i believe the correct answer is (fluctuated);