Which of the following wood species is known for its natural resistance to decay?

Cedar is recognized for its natural resistance to decay, making it an excellent choice for outdoor applications and environments where moisture is prevalent. This resistance comes from the natural oils and compounds found in cedar wood, which help to protect it from wood-destroying fungi and insects. As a result, cedar is often used in constructing decks, fence posts, and outdoor furniture, where longevity and durability are essential.

In contrast, other wood species may not possess the same level of natural decay resistance. Pine, while widely used for various applications, is more susceptible to rot unless it is treated or properly maintained. Oak, though strong and durable, does not have significant decay-resistant properties compared to cedar. Birch, while valued for its aesthetic qualities, is also less resistant to decay and typically used in interior applications rather than outdoor environments. Therefore, cedar stands out among these options for its durable, long-lasting qualities in the face of decay.