Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[Q]: Blood is made up of red blood cells, white blood cells, platelets, and plasma.
[A]: Blood is made up of red blood cells, white blood cells, platelets, and what else?


[Q]: Photoautotrophs and chemoautotrophs are two basic types of autotrophs.
[A]: Photoautotrophs and chemoautotrophs are two basic types of what?


[Q]: Drought makes marginal lands unsuitable for farming.
[A]:
What makes marginal lands unsuitable for farming?