B. Soil Contamination
All the other answers are talking about clean and pure things while this answer is the only negative one. So B is your answer.
Water is important to some organism.... i think
It will all make more sense if you start from the beginning of the sequence with the structure of DNA. You will remember that messenger RNA contains a sequence of bases which, read three at a time, code for the amino acids used to make protein chains. Each of the sets of three bases is known as a codon.
Answer:Photosynthesis is a process of cooking food by green plants using oxygen, Carbon dioxide, sunlight, water and minerals.
I hope it helped U
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