there are quite a few reasons how big brains helped early humans to survive, so I'll just list a few, and you can pick your favourite two;)
they helped them to use tools, hunt, and make fire.
they are just a few, but they're the best ones, i changed my mind about you picking:P
food
James Smith
The Native Americans in the area organized the early colonists and helped them survive. These natives showed the people what to eat and taught them about the nature and climate of the area.
They lived in caves and rock shelters.
they moved from place to place according to the weather
The domestication of plants and animals, leading to the development of agricultural practices, was the key factor that helped early humans transition to farming. This involved selecting and breeding plants and animals for desirable traits, ultimately allowing for the cultivation of crops and the raising of livestock. Early humans also learned to manipulate their environment through techniques such as irrigation, which facilitated agricultural development.
Early governments emerged because people found that being organized helped them survive.
They Used Trees To Make Tools To Hunt And Yea...
chief Powhatan helped Jamestown because the corn from the Powhatan had kept the colonist alive.
Early humans created tools to help them complete tasks more efficiently, such as hunting, gathering, and building shelter. These tools enabled them to adapt to different environments, obtain food, and protect themselves from predators, contributing to their survival and evolution as a species.
The fact that humans have always needed to have water to survive caused them to settle by rivers. The rivers provided drinking water as well as food. The climate caused the early humans to settle in warm areas.
In the early stages of space travel a chimp was sent to find out if humans to can survive.