Question

passage:
in the arctic, wildfires have been increasing in both size and frequency. some of these fires, known as \z
underground through the winter, even when snow covers the ground. these fires smolder in peat, a laye
of stored carbon. when spring arrives and temperatures rise, these underground fires can reignite above
zombie fires release massive amounts of carbon dioxide and methane - both greenhouse gases - back int
that had been locked in the ground for thousands of years. as more greenhouse gases trap heat, the arcti
peat. drier peat becomes easier to ignite, creating a cycle that releases even more stored energy from the
question: why might zombie fires become more common as the arctic warms?
peat becomes wetter and harder to burn.
peat dries out and becomes a better fuel source.
arctic winters will become colder and longer.
there will be less oxygen available for fires.

Explanation:

The passage states that "Drier peat becomes easier to ignite". As the Arctic warms, peat dries out. Drier peat is a better fuel source (easier to ignite), which would make zombie fires more common.

Answer:

Peat dries out and becomes a better fuel source.