Which answer best indicates the dynamic balance of an ecosystem?
space and food vs. temperature and water
number of plants vs. number of animals
number and variety of organisms vs. changing environment
number of organisms vs. constant environment

The right answer is number and variety of organisms vs. changing environment

Global warming therefore involves a transformation of the environment that results in the disappearance and the appearance of certain habitats and, more generally, by the displacement of the geographical area that hosts the habitats required for a species. So some animals are forced to move to a more adequate climate, otherwise they will not survive.

cramming before a final is bad because it makes a student's stress level higher. students who embrace cramming to get through a final exam week find themselves struggling to perform consistently, once the brain adjusts to prolonged sleep deprivation.