Interferon are small proteins (cytokines) that enhance the immune system and defense against viruses and bacterial infections.
Interferon stimulates the infected cells and those nearby to produce proteins. These proteins  prevent the virus from replicating within them. Further production of the virus is inhibited<span> and the infection is stemmed. 
</span>There are three types of interferon: gamma, alpha and beta. Alpha and beta can be produced from any cell, and gamma is<span> produced only by natural killer cells and T lymphocytes. The  main purpose of gamma interferon is to signal the immune system to respond to infectious agents or cancerous growth.</span>
        
             
        
        
        
The answer for this would be option 3. Based on the topographic map given above which shows three drumlins,  the direction of the advancing ice movement that created these drumlins and the arrangement  of sediments is <span>south to north ice movement, and unsorted sediments. Hope this answer helps.</span>
        
             
        
        
        
Your mouth, nose, throat, sinuses and lungs are lined with mucus membranes. These membranes contain mucus glands that produce - surprise - mucus. Mucus-producing membranes line specific passages in your body, like the respiratory and digestive tracts, for protection and support.
        
             
        
        
        
5. The person may say mean things to you through text messaging. That's cyberbullying. Or they can walk up to your house and hurt you physically or mentally.
6. I would advise Lin to tell a trusted adult ASAP and wait for instructions on how to handle it or tell them no and carry on with your day. Whichever makes you feel safest. 
7. If you use the methods given, you can keep yourself safe online and at home. 
Hope this helps!