The human pedigree shown here is for an inherited form of deafness caused by a recessive allele (d).
drag the labels to the pedigree to identify the genotypes of individual family members. if you can't tell with certainty whether an individual is homozygous dominant or heterozygous dominant for the trait, place the label "dd or dd" in that box.

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