Which sentence is correct?

there are all kinds of self/service vending machines in japanese cities.

there are all kinds of self-service vending machines in japanese cities.

there are all kinds of self service vending machines in japanese cities.

The correct answer is "There are all kinds of self-service vending machines in Japanese cities"

Explanation:

A sentence is considered to be correct if all the elements in it are written correctly and the general sentence follows grammatical and language conventions. In the case presented, the sentence "There are all kinds of self-service vending machines in Japanese cities" is the correct sentence because different from other options the term "self-service" has been written correctly. This can be explained as this term is a compound adjective that includes an adjective (self) and a noun (service), and according to grammar these type of words should be hyphenated (-) because they form a unit which means is a single term that derives from the combination of both words.

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."

one context clue that me find the meaning of luxuriance was that the base word of luxuriance is luxury, so i think that luxuriance means something that is luxury, or something luxurious.