Pyramids were built for religious purposes. The Egyptians were one of the first civilizations to believe in an afterlife. They believed that a second self called the ka lived within every human being. When the physical body expired, the ka enjoyed eternal life.
With the options provided, the answer to the phrase that trade union differed from the labor unions is that trade unions were organized or formed by skilled workers or workers employed in the building while labor unions are group of workers regarding if skilled or not.
