The three correct statements that accurately describe the lifestyle of the earliest humans such as Homo habilis are:
- They made use of tools and weapons.
- They lived in groups of 10–12 adults and their children.
- They hunted animals and probably scavenged food left by other predators.
Homo habilis is known for using simple stone tools and exhibiting social behaviors typical of small groups. They were predominantly hunter-gatherers rather than settled agriculturalists, and while they may have occasionally climbed trees for safety or foraging, their lifestyle primarily involved terrestrial activities.