B)The plant is not producing enough cellulose
It can help determine the quelity and safety of water. This can be a good deciding factor of choosing between tap vs bottled water. If the rating is too bad you should choose to use bottled water
Oceans will increase in temperature due to global warming. This will adversely effect cold water species such as the humpback whale and increase the territory of larger warm water predetors like sharks.
DNA is the correct answer.
Hope it helps!