Which of the following is an example of how a changing environment is important for the sustainability of living systems?
a.
the water cycle ensures that water used by one organism will be available for another organism in the future.

b.
global climate change may lead to the extinction of many species that are unable to adapt to the changes.

c.
the erosion of top soil reduces the diversity of organisms in an ecosystem.

d.
all of these

A. The water cycle ensures that water used by one organism will be available for another organism in the future.

Explanation:

Water is essential for the maintenance of life on the planet. All living things need water and everyone uses large amounts of this finite resource. For this reason, the water cycle is so important and has a responsibility to maintain the sustainability of living systems. This is because through this cycle, the water is used by an organism will go through several processes of evaporation and condensation and will return to the environment again, becoming available to another organism and, thus, maintaining life on the planet.

answer: 4

explanation: 8

rain is the best answer