D: Neutral mutation. It says the eyesight remains normal. Therefore it cannot be harmful. Changing eye color has no effect on the ability to find food. Eye color is just an appearance.
Circulatory system. This includes blood.
Servicing the interrupt
An interrupt is the signal to the processor from the hardware which say something about the problem that needs attention. This alerts the processor to respond and command an appropriate action to the problem. This can be done by suspending activities, saving current state and executing the interrupt handler. The interruption is just temporary after finishing the problem the processor will start again the normal activities.
