Final answer:
Tungsten, with the symbol W from 'wolfram,' has the highest melting point among pure elements and is used as a filament in light bulbs, making C) Tungsten the correct answer.
Step-by-step explanation:
The element that possesses the highest melting point among pure elements and is commonly used as the filament in ordinary light bulbs is tungsten. This element is chosen for filaments because the light emitted by tungsten when heated is white, as it contains virtually every frequency, making it suitable for general lighting purposes. Tungsten's one-letter symbol is W, which is derived from the name "wolfram." Therefore, the correct answer to the question is C) Tungsten.