Why is it important for Lenina to publicly prove her unfaithfulness to Henry?

Along the book they present different parts it shows the infidelity to him, since it is in case of the chapter 4 that Lenina demonstrates her infidelity  publisieh to Henry.

It is important, because she on having said publicly his feelings of infidelity, this one expressing his feelings and on having said it it breaks the rules of the company.

Is it Natural to be in a couple and raise a family in the Brave new World?

It is not natural because the rules that exist in this society deny it, instead of one to be happy with a woman, they could relate to many women without nothing was happening to them and without the woman was refusing,but to be happy we need to be free to find the real love, and it be possible only with a one special person.

What is the meaning of "pneumatic" when it is used to describe Lenina?

This word really means " full of air " but in the book is mentioned as an attractive woman ( a woman that every man wanted to have), thin, curved, etc.

What is "Soma" and why do people use it?

It is a designer's medicine that consists of treating the bad feelings, denials emotions and states of mind, etc. This drug meets reflected in the different states of mind, for which they take this tablet to be liberated of his bad reality.

Was Bernard a tall or a short man? How did this Affect his job? Please justify your answer by quoting from chapter 5.

He was a small and thin man, who does not feel for of the company since his physical condition towards which the others were observing it in the work, besides which they should joke of, provoking insecurity for being different from the others.

The differences in a society where everything tends to be standar, are condemned and well-known. There is no tolerance towards the differences.

It justify in the chapter 5 when it said: ” Bernard´s physique was hardly better than the average Gamma. He stood eight centimetres short of the standard Alpha height and was slander in proportion.” ……For this reason he was feeling discriminated…….“ into a Delta´s face, he felt humiliated”