Answer: i don`t know that much but
Explanation: if the magnetic field of the earth is decreasing year by year at one point it would be so weak that everything on earth would float here and there. the ocean of the earth would also float and as the ocean is one third of the earth the most of the earth would be covered in just floating water.
The levels of biological organization from individual to biosphere are, subatomic particles,Atoms,Small Molecules,Macromolecules,Moleculer assemblies organelle cell tissue organ organ system organsim population species community ecosystem and Biosphere
Hollow lightweight bones benefit the bird by letting it fly. If the bird had regular bones like any other animal, then the bird wouldn't have the ability to be able to fly due to the extra weight.
