The correct descriptions of the lifestyle of the earliest humans such as Homo habilis are:
A.) They made use of tools and weapons.
D.) They hunted animals and probably scavenged food left by other predators.
E.) They spent more time in trees than on ground.
Option B is incorrect because Homo habilis were primarily hunter-gatherers and did not settle in one area to raise crops. Option C may not be an accurate reflection of their social structures, as the size of their groups is subject to debate, but they likely lived in smaller, mobile groups rather than fixed bands of 10-12 adults.