A free grammatical morpheme is a morpheme that can stand alone as a word and has a meaning by itself.
In your list, "The" and "Table" are both free grammatical morphemes. However, "the" is a determiner, while "table" is a noun.
"Re-" is a bound morpheme because it cannot stand alone and must be attached to another word (e.g., "redo," "rewrite").
"Bird" is also a free morpheme but is not one of the grammatical morphemes.
So, to answer your question, "The" is a free grammatical morpheme, and "Table" is a free morpheme as well, but not grammatical.