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Since description is a mode of expository writing which is relied upon in other expository modes, we sometimes find difficulty in imagining a purely descriptive essay. In a narrative, for example, description can make the setting of characters more vivid; in a process paper it can insure that the audience understands the finished product. Regardless of how we use description, it is easy to see that it strengthens a sock considerably.
A moderation is an object, process, or technique which displays an element of novelty. An invention may sometimes be based on earlier developments, collaborations or ideas, and the process of invention requires at least the awareness that an existing concept or method can be modified or transformed into an invention. However, some inventions also represent a radical breakthrough in science or technology which extends the boundaries of human knowledge. Legal protection can sometimes be granted to an invention by way of a patent.