in the following observations of the CMB, the mottled (i.e., non-uniform) appearance is due to ___________ in a/an ____________ Universe.

Question

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The mottled appearance in the CMB is due to irregularities in the early universe, which eventually led to the formation of structures like galaxies and galaxy clusters. This suggests a flat universe, as an open universe would produce a much smoother CMB with fewer irregularities. The hotter temperatures are not responsible for the mottled appearance, as the CMB is almost uniformly cold across the sky.

In the Following Observations of the CMB, the Mottled (I