what does the immune system protect the body against? changes of the internal body temperature changes in…

what does the immune system protect the body against? changes of the internal body temperature changes in the temperature of environment changes caused by harmful pathogens changes in the ph of the blood
Answer
Brief Explanations:
The immune system's main function is to defend the body against harmful pathogens like bacteria, viruses, etc. It is not primarily responsible for protecting against internal body - temperature changes, environmental temperature changes, or blood pH changes.
Answer:
changes caused by harmful pathogens