where might we see changes in concentration in nature and how could these changes affect living organisms?

Explanation:

Any change in the climate of an area can affect the plants and animals living there, as well as the makeup of the entire ecosystem. Some species are already responding to a warmer climate by moving to cooler locations. ... Climate change also alters the life cycles of plants and animals

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

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layer 3 is younger than layer 6.