Mothers can naturally, passively provide protection against pathogens to their infants by giving them pre-formed antibodies in breast milk that are able to prevent some pathogens from adhering to the infant’s intestinal cells and infecting. which antibody type would be associated with this protection?

i think it is dna, i'm not totally sure but i think it might be.

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