The answer I believe is number 1
The atoms are going through decomposition.They are breaking apart into the elements they are made of.
The biology in which we study about the life of marine and what they eat and how they eat..ig thats how i will explain idk
If the climate is hot and dry then the biome will be a desert, if the climate is hot and wet, the biome will be a rainforest, if the climate<span> is dry and cool it would probably be a coniferous forest, if cold and wet, deciduous forest.</span>