Answer:
Science.
Explanation:
Depression may be defined as the medical condition in which the individual loses the interest in the social activities. The individual suffering from the depression enjoys the feeling of loneliness.
Different scientists have different views on the depression. Lopez explains that the depression might result due to the improper brain functioning and diet also. Here, Lopez tries to explain the depression on the basis of the sciences.
Thus, the correct answer is option (d).
