radiation therapy, chemotherapy, immunotherapy, targeted therapy, or hormone therapy.
They are there because people believe they are from not enough sleep but some people get them from genes. Genes are things you get from your parents.
Hope this helps!!
Unexpected means it was something you did not "expect" to happen such as a car crashing into you which means this is wrong.
Unfair is any injury.
Unnecessary means it was never needed and could have been prevented/not done therefore unnecessary is the best term.
Ingesting food that contains enterotoxins
