You are presented with the question "Lymphocytes are the key cells involved in what" and the following answer choices: 
- Veins and arteries.
 - permineralization
 - the skin
 - Animal survival
 - allergy attack
 - positive
 - massive damage
 - critical organs

Now knowing that lymphocytes are the key cells involved in the immune response and an allergy attack is an immunal response, choose the best answer.


 

     allergy attack    