The correct answer is Biodiversity. Biodiversity refers to the variety of life on Earth, encompassing both the number of different species and the genetic diversity within those species. To determine the answer to this question, you could have eliminated the other options by understanding their definitions. Speciation refers to the process of new species evolving from existing ones, but it does not specifically encompass the wide range of life on Earth. The biosphere refers to the regions of the Earth where living organisms exist, such as the land, water, and atmosphere. While the biosphere is closely related to biodiversity, it does not represent the full scope of the variety of life. Lastly, a biome refers to a large ecological region characterized by specific types of flora and fauna. Again, while biomes contribute to overall biodiversity, they do not encompass the entire breadth of life on Earth.
