3D space refers to a three-dimensional environment where objects have length, width, and height. This allows for the representation of physical objects as they exist in the real world. In 3D space, you can move in multiple directions: forward, backward, left, right, up, and down. In mathematics and physics, 3D space is often described using a coordinate system, such as the Cartesian coordinate system. Points in this space are defined by three values, typically represented as (x, y, z). This framework is essential for various applications, including computer graphics, architecture, and engineering.