Histamines are chemicals that your body makes up to help get rid of something that’s bothering you. in relation to allergies, histamines help you get rid of by coughing, sneezing, itching, etc.
They have an effect because the bigger the school the more activities you can do because you have more people.
The answer to the first unknown is "Sensation" while in the second unknown is "Perception". These two words are very different such that the "sensation" is when the sense organ detected external physical stimuli but the "perception" is the processing, organizing and interpreting of those stimuli captured by sensation in the brain.
Label it will have sum like “12 per serving size” then like “this has 2 serving sizes” so then 12 times 2=24 that’s how u know and get your answer hope this helps!!!