An adjective clause is basically a phrase (to be exact, a dependent clause: a group of words that can't be a sentence) that provides more description. It begins with a pronoun or adverb, like: who, whom, that, which, when, where, or why. It is not necessary to the sentence, so you can take it out and it still makes sense.
Let's work backwards. D is "If I put on headphones, I can play the electric piano without disturbing others." "If I put on headphones" is a phrase, a dependent clause, providing more description. Does it start with one of the words above? No. Is it necessary to the sentence? Yes, because this is the whole point of the sentence: to tell you HOW the character can play the piano without disturbing others, using headphones. D is incorrect.
Here's C: "I have taken piano lessons since I was six years old." "Since I was six years old" provides more description and is dependent. Does it start with one of the words above? No. Is it necessary to the sentence? Yes, because again, it's the point of the sentence. "I have taken piano lessons" doesn't tell you much! C is incorrect.
What about B? "When I first learn a difficult piece, I play it very slowly." "When I first learn a difficult piece" provides more description, and is a dependent clause. Does it start with one of the words above? YES: it starts with "when"!! We're getting closer. But is it necessary to the sentence? Try it: "I play it very slowly." But WHY does the character play it slowly? This phrase IS necessary, to explain, because it's the point of the sentence! B is incorrect.
That just leaves A: "My new electric piano, which includes over 1,000 different settings, is fun to play." The dependent clause providing more description is "which includes over 1,000 different settings." Does it start with one of the words above? YES, it starts with "which"!! Is it necessary to the sentence? Try it without the clause. "My new electric piano is fun to play." That works!! The clause is NOT necessary, starts with "which," AND provides more description! We have our winner!
Answer: A
<span>third person omniscient but depends on, how many MORE characters, in that case, limited.</span>
The speaker condemns the Divine Power, in the form of the Lord or Thy God. It is with great sorrow and sadness that the poem was written. This is because the plot seems to be focused on war and defeat that was happening during that time period. The author wanted to emphasize the role of the Divine Power in mediating his roles over His people.
It might be said that the adjective phrase to complete this sentences is option B (across the street) because it is providing information about the apartment, it is modifying the noun. In other cases, they provide more information, "because" is used to give a reason so it would be considered adverbial as well as, "for five years", it is related to time. Option D could be understood as a complement of the noun but not a modifier.