<span>your answer D<span>. Francesco Redi</span></span>
2019 years have humans been on earth
Because ocean acidification could affect the marine species negatively therefore altering marine life and biodiversity it affects humans as well, many people from all over the world depend on food that comes from the ocean we need these food for protein.
Carbon atoms got 4 surface electrons which makes them in the middle regarding the electrical surface charge and they can make a maximum relations of 4
Carbon dioxide is transported in the blood in three ways: (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin. Source: https://academic.oup.com/bjaed/article/5/6/207/331369