I believe more of a mysterious tone but im not for sure
Answer:
Commensalism is a type of symbiotic relationship where one party benefits and the other party is not significantly affected. A hermit crab takes over a discarded shell of a snail and uses it for his house. The hermit crab benefits and the snail are not affected - it's already discarded the shell and is nowhere around.
Explanation:
The lack of workers in the South limited the industrial expansion. I would recommend some Quizlet, which asks you questions through flashcards, a test, or even a little game. Hope that helps!