Ur answer is number 2 i'm almost sure of i
B. thick atmosphere
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The answer is C the main function of the kidneys is <span>filtering wastes from the blood</span>
The bronchi (singular: bronchus) are the airways that lead from the trachea into the lungs, and then branch into smaller bronchioles. Structurally, the bronchi are made up of cartilage that gives them stability and prevents their collapse.
