<span>Tropopause
Let Me Know If You Need Anymore Help
~Witt</span>
The Neolithic Revolution.
This, meaning new age, is when plants and animals were domesticated and a new age had begun.
Hope this helps :)
<span>Accretion is a gradual buildup of layers over long periods of time. As the weight of the layers increase during the buildup, gravity also increases and the pressure upon the layers below would increase and cause heat.</span>
Im probably super late by now- but the answer should be C... :)