What were the driving forces for the hunter gatherers?

The correct answer to this open question is the following.

The driving forces for the hunter-gatherers were the following. The most important driving force was survival. They basically needed to follow the herds to hunt them and feed their families in order to survive under difficult climate conditions. It could be hot days or cold days. They had to continue the hun and on their way, they collected fruits, seeds, and vegetables that also served well to feed their families.

These hunter-gatherers humans were formed by a few members. It could have been some families or a small group of people that strove for survival.

i beleive a. is the only possible answer

bless you your highness