The rabbit population may decline if the plant life starts to die or there’s an increase in the fox or wolf population.
First blank: The mobility of their hosts same goes for the second one :)
Answer:Over time, carbon-14 decays in predictable ways. And with the help of radiocarbon dating, researchers can use that decay as a kind of clock that allows them to peer into the past and determine absolute dates for everything from wood to food, pollen, poop, and even dead animals and humans.
Explanation:
What he did was say that evolution happened that over time the birds seemed to be changing
