Which of the following is the fourth sentence of the passage?

The correct order of the sentences is c, f, a, e, b, and d . Here, c is the first statement of the passage. First we have to mention about behaviour, and it gradually progresses into habits. c is the introductory statement. f is the second sentence, which talks about behaviour modification. The third sentence is a . It is the transitional sentence from behavioural modification to developing habits. e comes after a . b comes only after a . In b , ‘these healthy habits’ are mentioned, and we can see that ‘these’ indicates the ‘right kind of habits’ mentioned in e . The last statement is d . It talks about the attempt to understand the science behind them, which is mentioned in b.