Answer:
a). 'Absolute Threshold' refers to the minimum level of stimulation or arousal necessary for our senses (sight, smell, touch, vision, hearing) to detect or perceive an external stimulus at least 50% of the time. In this context, Marisol must sense the warmth of her environment to accurately recognize the temperature, at least half the time.
b). The difference threshold means the degree of change needed between two external stimuli for a difference to be recognized. In this instance, if there's a fluctuation in temperature, Marisol would be capable of noticing it due to the disparity between the temperatures.
c). Selective attention is defined as concentrating one's focus on a specific stimulus while ignoring competing stimuli at the same time. This kind of attention will enable Marisol to concentrate on particular aspects of the winter weather.