Q: The reaction of which body system causes food allergies?


Read this paragraph and choose the correct option from the provided answers:

Food allergies are like other allergies. They occur when the immune system reacts to harmless substances as though they were harmful. Almost ten percent of children have food allergies. Some of the foods most likely to cause allergies are shown below ( Figure below ).

 Choices:

- cardiac system

- lymphatic system

- nervous system

- immune system


A:
immune system