Depends.
Religion really varies. If you're in America, most people don't believe in a "greater being" and such. You get to choose what you want to believe in. If you grew up somewhere in the Middle East, religion is life. You follow the rituals and rules.
religion
Hinduism
Language and religion
one impotant culture is music
The important changes that the Israelis made to world culture and religion were technological and medical orientation and the affinity of religion and obligation.
We preserve our culture by following religion rules and regulations. Religion teach and make us aware of good and bad human behavior. How things in nature to be visualized and treated. So religion is more important.
Religion, clothing, and language.
To represent and be active with your culture or religion.
Islamic religion.
The hunting and gathering for food and the religion of moieties
Religion is an important part of culture because it helps establish morals and values. The belief in a higher authority prevent many people from doing bad things.
That depends on how you define 'need'. Religion seems more important, or at least more visible, in American culture than it does in Britian, for instance.