Alarge, round skull with lightly developed supraorbital ridges (aka "brow ridge") and relatively small jaws and teeth describe the anatomical features of homo

The described anatomical features belong to Homo habilis.

Explanation:

Homo habilis´ skull reflects its large and developed brain, compared to australopithecines.

Specimens of the species characterized by having a large skull and rounded braincase, due to the size of the brain. Their forehead was slightly appearing. They also presented the facial projection reduced. Their faces were flat with a shallow slope from the nose to the teeth, with a poorly developed brow ridge. They had small jows and reduced chin, as well as small teeth and molar increasing toward the back. The hole in the center of the skull, where it fitted the spinal cord, is reflections of their walking habits on two legs.

it is a learned trait

explanation:

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers