Ex1: It's all about how you think, how you approach.

Ex2: It's all about how to think, how to approach.

Question 1: Are both sentences grammatically correct? Are they examples of appositives or are they reduced relative clauses?

Question 2: Are the red parts dependent clauses while the blue parts practically are noun phrases?

Thanks in advance
'Approach' needs an object here.

Q1-- Yes. I see no reduction, so I suppose that they are appositiive. Actually, there's another stylistic term for parallel clauses without a conjunction, but it has slipped my mind.

Q2-- That sounds good.
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Couldn't it be something like "..how to think, which is how to view" ? (a case of reduced relative clause?)
I don't think so, because semantically one is not subordinated to the other. The speaker is offering two equal but differently worded statements to the listener. It is a typical instance of language negotiation.
Expanding on your answer to the second question a bit:

1. The dependant clauses in are considered as noun clauses because they contain a pronoun, right?

2. The phrases in blue act like noun phrases but they do not contain any noun. What is the construction behind it?

Both questions deal basically with the general notion that appositives are either "a noun or a noun phrase." I am assuming that I took the meaning too literally? And noun clauses are in fact included?

I feel that I may need a new thread for these questions though...
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