Q: What protects our body against disease-causing pathogens?  

Answer: B

The immune system is the body's defense against disease-causing pathogens. It is composed of a network of cells, tissues, and organs that work together to protect the body. The immune system is made up of white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus, and the bone marrow. These components work together to recognize and destroy any foreign substances, such as bacteria, viruses, and toxins, that enter the body.

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