Firs are evergreen trees belonging to the genus Abies, which are part of the Pinaceae family. They are known for their tall, straight trunks and needle-like leaves that remain green throughout the year. Firs are commonly found in mountainous regions and are valued for their wood, which is used in construction and furniture making. These trees produce cones that hang down from their branches, unlike other conifers that have upright cones. Firs play an important role in their ecosystems, providing habitat for various wildlife and contributing to soil stability. They are also popular as Christmas trees due to their attractive shape and fragrance.