Answer:
The phrase Julian is nonrestrictive, or rather, nonessential, because of the meaning of the sentence. The sentence says youngest brother - this means that there can only be one youngest brother, so it is unnecessary to actually name him. By stating that the brother is the youngest one, we already know who the speaker is referring to.
Hope this helps :)
Explanation:
"How to plant" is the indirect object because it's referring to the main idea without affecting the action.
Generally, it keeps the reader interested. Also, when you start an essay/story, include a hook to capture your reader.