Why did people domesticate plants during the Neolithic era? to adapt to the climate
to prevent soil erosion
to create a reliable food supply
to eliminate the need to hunt animals

To create a reliable food supply

Explanation:

This is why people were able to settle in permanent locations and had less stress.

this isn't a question and if you're going to list things be kind and use commas.

after the roman empire, the catholic church began to unify by taking on many duties of a government.