The correct answer is unattended or poses a significant risk to the child's life.
Leaving a child unattended inside a motor vehicle especially in a car, may put the child's life at risk and may also result into his or her death. Some potential threats that can put a child's life at risk inside a motor vehicle is due to suffocation and heat. It is impossible to breathe inside a motor vehicle, if it isn't running and especially if the windows are up and if the sun is bright and hot, the child may experience a heat stroke in the car.
