how a species changed over time how animals made a shelter the color of leaves on a plant the number of chambers in a dinosaur's heart
I gave my students this multiple choice question: What can scientists learn about the past by studying sedimentary rocks?

Only one answer is correct among these 4 choices:
- how a species changed over time
- how animals made a shelter
- the color of leaves on a plant
- the number of chambers in a dinosaur's heart

Could you tell me which one is correct?

how a species changed over time