Why are worker height weight and ability considered in ergonomics?

Correct answer: To make work arrangement according to the person

The direct answer is A: to make the work arrangement fit the individual. People differ in height, body weight, reach, strength, physical ability and tolerance for effort. Ergonomics considers these differences so that a chair, table, tool, load, control or working height can be adjusted safely. The reasoning is: human bodies are not identical → one fixed arrangement may not suit everyone → individual adjustment improves comfort, safety and performance. Option A is correct. Option B is wrong because these measurements are not primarily collected to make advertisements. Option C is wrong because ergonomic information is not meant to change a salary list. Option D is wrong because understanding the worker and task makes work safer and clearer, not hidden. This idea is called human variability: design should accommodate real people rather than assume one standard body. Memory cue: fit the job to the person, not the person to an unsuitable job.