What is an animal with 4 chromosomes?
not 4 pairs

the answer is c.) there is a warm front in region a and a stationary front in region b.

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; hydrologic cycle;