Concept:Casual employment is a type of work arrangement where workers are hired on a temporary, as-needed basis without fixed hours or regular pay.
Explanation:In casual employment, workers have no guaranteed regular schedule.
Employers call them only when there is work to be done.
The workers are not employed for a fixed period or given assigned uniforms.
They do not have the freedom to choose when to come to work.
The key feature is that the worker is called only when the employer needs them.
Answer:Option C: Workers are called to work only when the employees need them.