What is the definition of a concrete noun

This is a noun that can be identified through the 5 senses (taste, tough, sight, hearing, or smell)

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

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.