Which sentence correctly uses commas to separate a nonrestrictive modifier?

The man, who owned the floral shop, watered the shop’s hanging plants.
The young child-who is my nephew- is the cutest three-year-old ever!
My friend John, who owns a chocolate Lab puppy, is getting ready to leave for a trip.
The student, who aced the test, was excused from completing the homework assignment.

My friend John, who owns the chocolate Lab puppy, is getting ready to leave for a trip.

Explanation:

"Nonrestrictive modifiers" are words or phrases that follows a noun. It is separated by commas since it presents an information that is not essential to the meaning of the sentence as a whole.

Among the choices above, the choice "My friend John, who owns the chocolate Lab puppy, is getting ready to leave for a trip" uses the commas correctly in order to separate its non restrictive modifier.

The non restrictive modifier in the sentence is "who owns the chocolate Lab puppy." This modifies "My friend John." However, it is not an essential information in order to determine the meaning of the whole sentence since the sentence already mentioned the named John.  

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)

can you provide the possible answers