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

[Q]: You call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars, elliptical galaxies.
[A]: What do you call egg-shaped galaxies, which are reddish to yellowish in color because they contain mostly old stars?


[Q]: Dendrites from the cell body recieve impulses from other neurons.
[A]: What do dendrites from the cell body recieve impulses from?


[Q]: A fewer predators is most likely to cause the number of rabbits living in an area to increase.
[A]:
Which factor is most likely to cause the number of rabbits living in an area to increase?