Can I have help with this question
(It's in the picture)​

First line of defense  ⇒ mechanical barriers that prevent microorganisms from entering the body

Second line of defense  ⇒ cells and prosses that help remove or neutralize organisms that have penetrated mechanical barriers.

Third line of defense  ⇒ complex defense that recognizes and reacts to specific organisms.

I hope this helps!

i wish it got that cold here ): im in florida and i've never even seen snow, it never feels like a real holiday. i hope you have a good one with your family !