It is the biosphere, which is all the ecosystems of the earth
In biosphere, it is the total organismic life and their entire species on which how they interact with the co-organisms. While biodiversity, is the different and varied living organisms and creatures across the ecosystem or the biosphere, on which is the composed the biotic environment. This may include now the hierarchy and organization among the species of the autotrophs and heterotrophs.<span> </span>
Because the cells always diverted when break down
Phenotype = Observable/Physical characteristics.
Simple because there would be a larger gene pool, more opportunity for variation than a small population which has less of a gene pool and therefore less opportunity for variation.
D or "The park will provide a habitat for many species of Flora and Fauna"
I believe it's A. If an organism changes and evolves slowly over time it is caused by variation, which helps the species adapt to it's habitat and way of life