COMPLIMENTARY is the correct spelling with an I not an E
(also it is missing a period)
ANSWER:
The error us that it is missing a punctuation at the end of the sentence.
COMPLEMENTARY:
Combining in such a way as to enhance or emphasize the qualities of each other or another.
COMPLIMENTARY:
Expressing a compliment; praising or approving.
Hope this helps you!!! :)
