Calpurnia's cot shows how segregation is everywhere in Maycomb, including the Finch home.
We know that Aunt Alexandra has somewhere to sleep when she stays with them, suggesting that they have a spare bedroom. However, when Calpurnia stays with the Finches, she is not allowed to stay in the spare room.
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It is only possible to know the implicit morality of a story after reading it. However, we know that the moral of a story is a teaching that the story wants to pass on to the reader. Implicit morality, on the other hand, is also a teaching, but it is transmitted to the reader in a subjective and indirect way, but noticeable.
Answer:
The Immigrant Contribution is a story written to show the reader all the things Immigrants have done for us as a whole and how we should appreciate the things they do for us because some of the things that need to be done that we are not willing to do willow done by immigrants maybe to get some money to provide for people.
It is 4. because it says in the paragraph and I quote: "helium has a very low density. it is used in daily weather balloons to carry instruments that record, tempature, humidy, and pressure readings in the atmosphere.