And 3 to 5 sentences relate dark matter to the development of the universe after the big bang speculate on how the development of the universe would have been different if there had been no dark matter and your answer use the term structures

Dark matter plays a crucial role in the development of the universe following the Big Bang by providing the gravitational scaffolding necessary for the formation of cosmic structures. Without dark matter, the observed structures like galaxies, galaxy clusters, and larger-scale formations would have developed very differently; normal matter would not have clumped together efficiently due to insufficient gravity. This lack of clustering would likely result in a universe dominated by diffuse gas and scattered stars, preventing the formation of the complex, rich structures we observe today. The absence of dark matter could have led to a vastly different cosmic landscape, potentially leaving the universe as a relatively homogeneous and less dynamic environment.