D. sum of all chemical reactions in an organism
Climate change is the variation in the climatic factors and attributes like temperature and weather conditions of a region that can result in warming, ice melts, acidification etc.
Species cannot adapt fast enough to survive the change in their environment.
<h3>What is natural selection?</h3>
- Natural selection is the biological process of selecting the fit organism with better traits and qualities compared to another.
- It is a mechanism of evolution that help organisms to adapt to altered conditions and makes them more likely to survive in the conditions.
- Due to rapid climate change, the organisms are not able to adapt to the altered conditions.
Therefore, option C. is the correct option.
Learn more about climate change and natural selection here:
brainly.com/question/26144932
Smallest to largest- molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.
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