Yes. This is my structure:
1) Light, suggesting that she must control the light using studies from Siffre and Aschoff and Wever
Then since the question was 'Discuss' I said that the influence that these changes will have will be limited bc research has shown that endogenous pacemakers are more important :
1) Talked about how temperature varies with the time of the day as well as a study by Folkard where he was not successful in reducing the participants s-w cycle to 22h, so controlling the exogenous zeit will only do so much