What is the rule about ''()'' in GT guidelines?​

According to GT guidelines sentence and paragraph structure should be correct.

Explanation:

Do not use double spaces after the sentences. All sentences should have correct punctuation and should start with a capital letter.

coin toss of the tosses to the toss

explanation:

if you’re a fan of chocolate, every occasion is right for this treat. feeling down? eat some chocolate. celebrating? eat some more. want to show your valentine how special you think your sweetheart is? offer up chocolate!   people have been enjoying chocolate as a food, drink and medicine for thousands of years. the ancient maya and aztecs called chocolate kakaw and used it as medicine. they also made chocolate offerings to their gods. chocolate comes from the cacao (kuh-kow) tree, and its scientific name reflects its history. theobroma cacao translates to “cacao, food of the gods.” these days, chocolate is not just for deities. the treat has become popular around the world.