a hard-working labourer needs more fats and carbohydrate than those who are working in the office

Labourer always have a bunch of work to do. Therefore, they need much energy which they get from carbohydrates and fats.

Because a hard working labourer do more physical work as compare to working in the office

Labour's works more than office workers therefore labour's needs more carbohydrates and fats because labour's carry heavy ites on his back and office workers only sit on chair and work's with comfort