2. The occurrence of large or small beak sizes among seed crackers in the absence of medium-sized beaks is an example of
Directional selection
Stabilizing selection
Normal distribution
Disruptive selection

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

answer; nociceptive pain;