Mount Erebus Is the Second-Highest in Antarctica
Puzzle 1 of Antarctica Medium Pack
Question is: Mount Erebus Is the Second-Highest in Antarctica
and the answer is: VOLCANO
Word Meaning:
VOLCANO — A vent or fissure on the surface of a planet (usually in a mountainous form) with a magma chamber attached to the mantle of a planet or moon, periodically erupting forth lava and volcanic gases onto the surface.
Definitions from Wiktionary.