Hey there!
I believe the answer you're looking for is radio wave
Hope this helps!
Answer:
So the egg definitely came first.
Explanation:
Dinosaurs laid eggs, the fish that first crawled out of the sea laid eggs, and the weird articulated monsters that swam in the warm shallow seas of the Cambrian Period 500 million years ago also laid eggs. They weren't chicken's eggs, but they were still eggs.
The younger rock would be black and have like no stains and it would not be as dirty as the older rock hope this helps!!1
Stop using plastic straws, use paper bags, use reusable water bottles, recycle, use metal silverware