Ancient rock cores around which the continents are formed are known as a) shields b) cratons c) supercontinents d) tectonic plates

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

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Modern whales developed their traits through natural selection what occurs during the process of natural selection