Korean Political History II: Chapter 5, Exercise 3 — Possible Solution
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CAUSES LISTED
Soviet collapse (energy imports down 75%), the 1995 floods, an inflexible
planned economy on land with only 20 percent arable, and sanctions.

WHY A SINGLE CAUSE IS UNSUPPORTED
The source names them together and does not rank them. Removing one would not
show the others alone were sufficient, and I have no evidence about their
relative weight.

BETTER SENTENCE
"The source attributes the famine to several factors, including the loss of
Soviet support, floods and the structure of the economy."