Sentence stracture

[Åmɣř Δşhωăł]

Hey
Im tryin to understand the stracture of this sentence :

Pourquoi est ce qu'il n'est pas nécessaire de nager pour garder son équilibre dans la mer de Morte ?

As far as i understand it means : why isn't it necessary to swim to keep your balance in the Dead sea.

Now my question is why all these " est ce qu'il est " , and not just " pourquoi n'est ce pas nécessaire ?"
Thanks.

 

[Maître Capello]

Hello,

Please use specific, meaningful thread titles. Also, as already requested, please use proper capitalization (the pronoun "I" must be capitalized in English), and please look for existing threads before starting a new discussion.

In particular, please read the following threads, which address your question:
FR: c'est <adjectif> / il est <adjectif> que/de
FR: Façons de poser une question : est-ce que / inversion sujet-verbe / intonation

This thread is therefore closed to prevent duplication.

Thank you for your understanding.

Maître Capello
Moderator