What element is represented by the symbol O?

The symbol O represents the element oxygen. In the periodic table of elements, each chemical element is assigned a unique one- or two-letter symbol derived from its name, often based on its Latin or Greek roots. For oxygen, the symbol "O" is both intuitive and straightforward, as it corresponds directly to the first letter of its name.

Oxygen is vital for life on Earth, as it plays a crucial role in respiration for most living organisms and is a key component of water. Understanding elemental symbols is important in chemistry, as they allow scientists and students to communicate complex information succinctly and accurately. The other options, while representing real elements, do not correspond to the symbol O and are different in terms of their properties and significance in both chemistry and biology.