It is produced by cells known as mast cells. Histamine is a protein molecule with the chemical formula C5H9N3. It serves as an important part of our body's immune response. When we come into contact with an allergen, such as pollen or animal dander, histamine is released by the body to the site of contact.
Answer: The answer is C.
Explanation:
"Her mother is trying to help her become "respectful to her brother". If you yell at someone, that's not being very respectful to them. For me, I had to think a bit for this question trying to figure out which one it was. After a while, I figured out it was C.
Hope this helped!
Gym............................i need more context tho what are the answer choices
