I think it is 9.12 I might be wrong but I think it’s 9.12
Answer:The immune system is a network of cells, tissues and organs that work together to attack pathogens that try to invade your body. Bacteria, parasites and fungi that may cause infection meet a system of immune soldiers, including T-lymphocytes, macrophages and neutrophils.
Explanation:
Pretty sure it’s B cause i did this question before
