D) Amount of precipitation
<span>Selective breeding is the process of breeding plants and animals for particular traits.</span>
Answer:
incoming Paleoindians, the first Americans, who allegedly hunted them to extinction.
Answer:
At the very bottom
Explanation:
When examining a cross section of rock layers, the oldest layer is on the bottom. This is because over time, newer rock layers continued to form on top of the oldest one.
