ISO is the sensitivity of your sensor to light. The ISO setting you use depends on the amount of light in the scene you are photographing. The more light you have to work with the lower you can set your ISO.
Each side of your brain contains four lobes. The frontal lobe is important for cognitive functions and decision-making. The parietal lobe processes information about temperature, taste, touch and movement, and spatial orientation. The occipital lobe is primarily responsible for vision.
A set of structures in the centre, known as the basal ganglia, are responsible for sending messages between the separate areas of the brain. The lobes are responsible for controlling; problem solving and judgement (frontal lobes), sensation and body position (parietal lobes), memory and hearing (temporal lobes), and the processing of visual stimuli (occipital lobes).