1. Event Horizon: Represented by the red circle, this boundary marks the region around a black hole beyond which no information or matter can escape to the outside universe. It defines the limits of the black hole’s influence. 2. Singularity: Denoted by the central blue dot, the singularity represents the theoretical point of infinite density and gravitational pull within the black hole. All matter and energy drawn into the black hole ultimately collapse into this point. 3. Time: Indicated by the upward arrow, it highlights that within the event horizon, time inexorably moves towards the singularity. Any object crossing the event horizon follows this arrow's direction, unable to avoid eventual collision with the singularity. 4. Space: Represented by the downward arrow, it signifies how, within the event horizon, spatial dimensions become distorted. Movement within this region is no longer free in the usual sense but is inevitably directed towards the singularity.