Answer:
B. An amino acid
Explanation:
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Nonpoint source so your answer would be B.
Painful withdrawal symptoms can occur when a drug user attempts to stop using Drugs.
Cladograms are concerned with the way organisms are related to common ancestors through shared characteristics. Phylogenetic trees compare organisms over evolutionary time and the amount of change that has occurred over time to figure out the relationships.
I believe it's A, but I could be wrong. I apologize if I am so. I will do further research and get back to you