Matter is made up of atoms and has mass. This is because for anything to be considered matter it must contain atoms and atoms must have mass.
Histamines are chemicals released by the body as an allergic response.They help the body by reacting when their are "intruders" so when enters, histamine acts as a messenger and sends out a signal for the body to create a reaction helping to get rid of teh intruder through some type of reaction.
Answer:
4
Explanation:
Because the elephant challenged him
<span>the study of living organisms, divided into many specialized
fields that cover their morphology, physiology, anatomy, behavior,
origin, and distribution.</span>