What is the result of HIV in the human body ? A. Reduced number of erythrocytes B. Reduced number of thrombocytes (platelets) C. Reduced number of lymphocytes D. Increased number of lymphocytes

The correct answer is option (C) i. e. Reduced number of lymphocytes in the human body.

Explanation: HIV attack on the immune system of human body and reducing the number of white blood cells which are responsible for the defence of body against bacteria, viruses etc. HIV virus cannot reproduce and grow on its own. The HIV virus attached to the white blood cells and goes inside the white blood cells and start growing and grow in number.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.