True. Immune response is always changing. Hense our immune system is what keeps us healthy.
I would say D- acidification of the ocean caused by increased atmospheric carbon dioxide emissions that dissolve in water.
Answer:
Explanation: D- they produce less hazardous waste
"Carolus Linnaeus is the father of taxonomy which is the sytem of classifying and naming organisms. One of his contributions was the development of a hierarchical system of classification of nature. Today this system includes eight tata: doman, kingdom, phyrum, class, order, family, genus, and species"