Which represents a theory?
i observed three stars in the sky. the stars give off light.
light travels at 300,000 kilometers per second. stars are balls of hot gases.

i think the miocene epoch spans the time from 23 million to 12 million years ago.

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.