________only emit gas.

Question

Quizplus · Accepted Answer

Fumaroles are openings in the Earth's crust from which volcanic gases escape, without any molten rock or lava being ejected. Calderas are large craters formed by the collapse of a volcano into the emptied magma chamber, and can emit gases as well as lava. Parasitic cones are smaller vents that develop on the flanks of a larger volcano, and can emit both lava and gas. Craters are depressions caused by volcanic explosions, and can emit both lava and gas. Therefore, the only choice that exclusively emits gas are fumaroles.

________Only Emit Gas