How are healthy ecosystems able to maintain balance between the different organisms that live within it?

A well-balanced ecosystem functions via the cycling of energy and materials. The sun is the most important source of energy for ecosystems. The photosynthesis of sunlight by plants results in the production of oxygen as a waste product, which is then used by animals in the process of respiration. Animals, on the other hand, generate carbon dioxide as waste, which is then used by plants.

Explanation:

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they deliver oxygen to the blood

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).