Question

according to the big bang theory... the universe formed during a single event in which all matter and energy suddenly expanded from an extremely dense and hot point. the universe formed during a series of events in which huge amounts of matter and energy expanded from several extremely dense points. each version of the universe contracts until all matter collides at a central point, then explodes outward to begin the process again with a new universe. the universe has always existed in its current state, with a constant average density.

Explanation:

The Big - Bang theory posits that the universe originated from a single, extremely dense and hot point. There was a sudden release of energy and matter which then expanded. This is consistent with the first option description.

Answer:

The universe formed during a single event in which all matter and energy suddenly expanded from an extremely dense and hot point.