Holz is the German word for "wood," which is a natural material derived from trees. It is composed of cellulose fibers, which provide strength, and lignin, which gives it rigidity. Wood is widely used in construction, furniture making, and various crafts due to its durability and aesthetic appeal. There are many types of wood, each with unique properties. Common varieties include Eiche (oak), Buche (beech), and Kiefer (pine). These woods differ in color, grain, and hardness, making them suitable for different applications. Wood is also a renewable resource when sourced sustainably, contributing to environmental conservation.