Answer:
Proximal convoluted tubule
Explanation:
The major work of re-absorption is carried out in nephron by the proximal convoluted tubule (PCT). The PCT re-absorbs all the essential nutrients such as amino acid, potassium, glucose etc. and water driven by passive transfer based on concentration gradient. Along with gradient, pH of the urine also affects the re-absorption. Based on the pH of the urine (basic or acid), re-absorption of ionized acid increases or decreases.
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I am positive it is C, so so so sorry if I’m wrong but it should not be
It’s not herbivorous because no, and it’s not detritus because again no, and not parasitic so your only answer left is mutualistic which it is