Answer:
Gold is usually alloyed in jewellery to give it more strength, and the term carat describes the amount of gold present (24 carats is pure gold). It is estimated that all the gold in the world, so far refined, could be placed in a single cube 60 ft. on a side. It is metallic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple.
Cause he was the main character of story
Seen is something you've already seen and saw is something you want to see
E- planning is organizing your thoughts
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Contrast, because that is pointing out the differences.