Your immune system protects you from bacteria and viruses. Sometimes it misreads a harmless substance as a threat. When that happens, your body creates chemicals, like histamine, that trigger an allergic reaction. It's unclear what causes your immune system to make the mistake about certain things.
I think it would be: weathering, Deposition
Weathering and erosion are very similar but erosion is when the remains of a rock (in this case) is moved away from the area it was formed
What was c? But I think its A.) a molecule that changes state.
Answer:
Explanation:
adj. Moving or operating in one direction only: a unidirectional microphone.
The doctor who is concerned that wilma may have a brain tumor recommends that a(n) positron emission tomography (PET) scan.
PET scan is a scan imaging test that allow doctor to check disease in human body. This scan uses a special dye that contain a radio active tracer.This scan provide information about blood flow and how body is using oxygen and sugar.
