Does this sentence contain a mistake? Although my summer job was not easy and was not lucrative either, I learned a lot about self-discipline and
perseverance.

neither easy nor lucrative

not easy but lucrative

not easy and lucrative

not easy, but also not lucrative

No improvement or correction is required

neither easy nor lucrative

Explanation:

your answer is c) experiments with water vapor showed that elements combine in specific proportions.

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.