Answer: c. innate external defenses.
Explanation:
Germs, bacteria, fungi and viruses are everywhere. Our bodies have a complicated defense system both outside and inside. The body's first line defense system is our external defense system, which protects us from harmful agents and prevents them from entering our body. The skin, digestive pathways (stomach), tears, mucus, saliva, cilia (small hairs), and good bacteria in the bowel are all categorized under external defense system.
