Which of the following is not a mutualistic relationship?
a shark using an aquatic cleaning station
a helminth feeding from its host
a bumblebee collecting pollen from a flower
bacteria living in the gut of humans

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

d. changes in climate and historical records

hope this