Assuming the italicized clause is <em>Since its establishment, </em>the correct answer here is elliptical clause.
Elliptical means that a word which would normally be part of a sentence is excluded, usually for stylistic reasons. Here, the verb is missing, which is why it is elliptical. The question is oddly formulated too - given that there is no verb here, it cannot be a clause, but rather a phrase, but since there is no such option here, then the correct answer is elliptical clause.
2. Word choice and sentence structure help create interesting stories, word choice helps because you can use any words that are similar to the word for example: you can use then but you can also use therefore. Having a large vocabulary means being able to have a vast variety of word choices to pick from.
Answer:
childish, obnoxious, blaring
