Read the sentence.

alma plans to visit london and paris, where her parents went on their first trip together as a married couple.

what best describes the underlined part of the sentence, and why?

it is a restrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.
it is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is necessary to the meaning of the sentence.
it is a restrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is necessary to the meaning of the sentence.
it is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.

It is a nonrestrictive relative clause because it begins with a relative pronoun, has both a subject and a verb, and is not necessary to the meaning of the sentence.

Explanation:

A non-restrictive relative clause is represented by a sentence that shows additional statements to another sentence. We can say that the bold part shown in the above question is a non-restrictive relative clause because this sentence gives additional information to the reader to understand why Alma wants to visit London and Paris. In addition, this sentence begins with a relative pronoun, has a subject and a verb, and is not necessary for the meaning of the sentence, but presents additional information.

the legal limit for the drivers who can drive after consuming any amount of alcohol is 21 years.

explanation:

on november 1, 1996, a "zero tolerance law" was put into effect in the new york state.

according to this zero tolerance law, for people under the age of 21 years, it was illegal to purchase and possess alcohol or to drive after consuming any amount of it.

also, the alcohol involvement rate for the drivers under the age of 21 was roughly twice that of elderly drivers.

the illustration   that would give a reader a clear understanding of the text is a picture of men constructing the frame of a building.the frame is made of iron bars. the text describes the job of blacksmiths'. these were very organised and they had different names: "the driver" and "the heater". the text describes the way in which these men worked ; they worked iron pieces as if they were playing a sport. in fact, the text wants to show the men's skills. the text also puts some emphasis on the use of '' rivets'' in construction. this kind of nails were not always used in the construction of manhattan.

some examples:

"and with an underhand toss he hurled the smoking rivet straight at the catcher, who caught it in mid-air in his catching can." men's skills

"when the driver was ready for a new " the emphasis on the rivet ( special nail used in construction).

" it against a beam to remove any cinders, and jammed it into the waiting hole. " the emphasis on the rivet.