If the root word trouver means “to find,” what does the word retrieve mean in the following sentence? the dog was trained to retrieve the ball.

The word 'retrieve' means to get something back or to recover something.

In the above sentence, 'The dog was trained to retrieve the ball', the word retrieve refers to the that the dog was trained in getting the game or ball back as wherever it was thrown.

Synonyms of word retrieve are, recovery, retreat, bring somethings back replace and so on.

a.) it provides a clue to solve the mystery.

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.