Edward Abbey lived sparingly in the desert, relying only on basic necessities like water, shelter and enough food to survive,
What does sparingly mean?
O 1 elaborately
2. Simply
O 3. comfortably
4. warmly
It means that they didn't put anything to waste when they were in the desert; they spared everything they had. I would say that its answer 2, since it is the only thing that makes sense.