Which of the following is true regarding oxygen and fire?

Oxygen can enhance combustion because it is a key component that supports and accelerates the burning process. When oxygen is present in higher concentrations, it increases the rate at which materials ignite and burn. This means that environments rich in oxygen can lead to more intense fires and can cause materials that would typically be slow to ignite in regular air, which contains about 21% oxygen, to catch fire more readily.

In contrast, other options are inaccurate. Oxygen is not safe to use in all conditions, as specific environments or situations, such as those involving flammable materials, can pose significant risks when oxygen is introduced. Oxygen itself is not flammable, meaning it doesn't catch fire on its own; however, it supports the combustion of flammable items. Additionally, oxygen is not an inert gas; inert gases do not react with other substances under standard conditions, whereas oxygen actively participates in combustion reactions. This makes the statement regarding oxygen enhancing combustion the most accurate choice.