In the DNA, that is why they are called the building blocks of life.
Please include the animals when you redo this question.
B, because species b has a higher percentage of survivors to old age than species C. Species a still has a higher rate than species C so the answer is b.
Eutrophication, the process by which a body of water acquires a high concentration of nutrients, has become known to the environmentally aware community as a key human stressor on the world's ecosystems. High concentrations of nutrients, specifically phosphates and nitrates, promote excess growth of primary producers.
