What force was the sole architect responsible for aggregating matter into halos in the early universe?

Answer

Gravity

In the initial cooling and aggregation phase after the Big Bang, gravity was the only mechanism driving the formation of massive clumps of primordial gas known as halos within the dark matter scaffolding.

What force was the sole architect responsible for aggregating matter into halos in the early universe?
Spacestarscosmologyformationastrophysicsnebulaestellar formation