Answer :
The correct option is " They needed more reliable sources of food and supplies".
Neolithic is termed the stone period. This is so because this was the evolution of the prehistoric humans that developed and discovered many of the things that are made up of stones.
The people of this era domesticated both flora and fauna that means plants and animals as the forest was their inhabitants, plants were their food eatables and animals were the ones that they can hunt, play, tame, and sometimes can also have them in their meals. They were using plants and animals with various methods and types.
Therefore, the option " They needed more reliable sources of food and supplies" is the correct answer.
To know more about the Neolithic era, refer to the link below:
https://brainly.com/question/1121440