Which is a density-independent factor?
space
food sources
shelter
hurricanes

Density dependent factors are the aspects of the environment that limit a population's growth regardless of the density of the population. So in this case, the answer is hurricanes.

No because the eaeht is on a 23.5 degree axis tilt and so when it is winter the northern hemisphere is pointing away from the sun and the soutubern hemisphere is pointing toward the sun