Consolidate comes from the Latin roots com- ("together") and solidare ("to make solid"). So, consolidate is to bring things together to make something solid, stronger, or easier to handle.
Adding -s is the most common. for example: books, cups, pencils, etc. -es might have been the one that confused you, but that isn't a super common ending for plurals--instead, a more common one would be "-ies" which is when you drop the y (berry becomes berries, for example).
Answer:
Interesting
Explanation:
I read an <u>interesting</u> article yesterday.
A because they all have the -ing
