Identify the study of movements like lifting, sitting and chamging positions.

Motion study

The correct answer is option (2) : Motion study

The study of movements like lifting, sitting, and changing positions is called Motion study.

Motion study refers to the study of movements like lifting, putting objects, sitting and changing positions, etc., which are undertaken while doing a typical job. Unnecessary movements are sought to be eliminated so that it takes less time to complete the job efficiently. For example, Taylor and his associate Frank Gailberth were able to reduce motions in brick layering from 18 to just 5. Taylor demonstrated that productivity increased to about four times by this process.