An elliptical clause is a kind of clause with an ellipsis; meaning that there are words that are left out. So here are two sentences using elliptical clauses. The sentence using than: -She sees you more often than I. (The missing words here are "I see you") The sentence using as: -He likes the movie just as I do. (The missing words here are "I like it). Hope this examples help.
The correct answer to this question is jargon. It is
considered specialized language because it is understood by only specific group
of people or professionals and is not easily defined by ordinary people. The
executive office of the president clearly stated the exclusion of jargons and
other unnecessary complexities in memorandum.