A model which is typically used to describe the structure of the paragraph is: B. the sandwich.
A paragraph can be defined as a formatting technique used typically for separating the main ideas of an essay into a sets of logical units, in order to enhance or facilitate a reader's ability to easily follow a writer’s argument or points.
In English literature, paragraphs are primarily used by a writer to break the main ideas of an essay into manageable but logical and organized units. Therefore, each paragraph contained in an essay or writeups are carefully constructed and focuses on just an idea from the main idea and illustrates logical, coherent and succinct sentences to enhance the idea.
On a related note, a model in English literature that is adopted by writers to help a reader remember the careful construction of the sets of logical ideas (units) is referred to as the sandwich.
A sandwich literally means having two (2) pieces of the same thing, with some additional or extra items (information) in the middle. Thus, a sandwich can be used to describe the structure of the paragraph.
Basically, a sandwich comprises the following important parts;
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