Answer:D
Explanation:All things are made up of atoms but only living things are made of cells.
A. geographic range because there is a range of area where a species can thrive but after you reach a certain point the climate and environment changes and species will no longer be able to withstand it. Climate, weather, and sometimes habitat would all be considered abiotic factors.
O2 is just elemental oxygen. It's a pure substance, but not necessarily because it only contains oxygen atoms, it's because there's only oxygen molecules present.
