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

[Q]: Fires, mainly caused by lightning, are a natural disturbance in temperate grasslands.
[A]: Fires, mainly caused by what, are a natural disturbance in temperate grasslands?

[Q]: Ice masses, acquifers, and the deep ocean are examples of water reservoirs.
[A]: Ice masses, acquifers, and the deep ocean are examples of water what?

[Q]: In physics, temperature is defined as the average kinetic energy of the particles in an object?
[A]:
In physics, _______ is defined as the average kinetic energy of the particles in an object?