A. Skeletal and muscular
the other three don’t have to do with this type of internal movement though as the abdominal region and internal organs don’t have to do with this, A is the only possible answer
Answer:
They absorb the food molecules that result from the external digestion.
Explanation:
Answer: possibly A
Explanation: B an C are not it because they are more like mutations. D humans don’t always become immune.
Answer:
I would limit almost anything on the mountains.
Along with that, build very sturdy walls to assist prevention from them hitting the city, of course have the "moved land" to a different location.