Answer:
he body's first line of defense against pathogens uses mostly physical and chemical barriers such as sweat, skin, tears, mucus, stomach acid, and so on.
Explanation:
The Ming emperors made it their capital in 1421 and it remained China's capital till 1912 when the Manchu Empire fell and SunYat Sen turned China into a republic.
I think maybe Christianity maybe not sure tho I didn’t really get the question
B.rely on wind power rather than electricity
Physical erosion and chemical erosion
I'm not sure its correct the two might be considered the same