Final answer:
In existentialism, 'givens of life' refer to inescapable aspects of the human condition such as death, freedom, and isolation, not societal constructs like taxes.
Step-by-step explanation:
The existential 'givens of life' encompass several themes but taxes are not typically considered one of them. Existentialism as a philosophical movement emphasizes individual existence, freedom, and choice. When talking about existential 'givens', these include fundamental aspects of the human condition that are inescapable, such as death, freedom, and isolation. These are inherent parts of life that every person must grapple with. The notion of taxes, while perhaps universally experienced, is more of a social and economic construct than an existential given.