The main consequence of the many cycles of earth, such as the life cycle, biogeochemical, and geochemical cycles, is 1.keeping the earth running and moving 2.keeping us alive 3.maintaining a balance or equilibrium on earth 4.adding and removing earth materials and chemicals

The correct answer is option 3, that is, maintaining a balance or equilibrium on Earth.  

The biogeochemical cycle refers to the natural passages by which the important elements of living matter are circulated. The most essential biogeochemical cycles are the nitrogen cycle, carbon cycle, phosphorus cycle, oxygen cycle, and the water cycle. A geochemical cycle refers to the passageway, which is taken by the chemical constituents in the crust and the surface of the Earth.  

The biogeochemical and the geochemical cycles always possess a condition of evenness. The state of symmetry takes place when there is a steadiness in the cycling of the elements among the segments.  

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.