This is needed to form possessive nouns and contradictions called what?

The element needed to form possessive nouns and contractions is an apostrophe (').

Here's why:

* Possessive Nouns: An apostrophe and an "s" are used to show ownership. For example: "the dog's bone" or "the children's toys".

* Contractions: An apostrophe is used to combine two words into one, replacing missing letters. For example: "don't" (do not), "can't" (cannot), "it's" (it is).

Let me know if you have any other questions about apostrophes!