During his early work, social psychologist normal triplett noted that cyclists were faster in races against other riders than they were when they were racing alone against a clock. this lead to his concept of

Social facilitation

Explanation:

Social facilitation: In social psychology, the term social facilitation is defined as the phenomenon in which an individual tends to perform in a better way on a particular task when he or she is around the other person. The term social facilitation was originally introduced by Norman Triplett during 1898 and therefore it was named or labelled as social facilitation by a famous psychologist named Floyd Allport during 1920.

In other words, it is defined as a process in which an individual's performance is being affected or facilitated due to the mere presence of the other person in either a good or a bad way.

In the question above, the given statement leads to the concept of social facilitation.

taking a bath requires the most water out of the given options because it takes a significant amount of water in order to fill a bathtub.