There – adv – in or at a place; indicating a location
I am going to put this book over there on the table.
Their – possessive pronoun – belonging to them
I got a personal tour of their new home.
They’re – contraction – a contraction, short for “THEY ARE”
They’re really nice people once you get to know them!
THERE vs. THEIR vs. THEY’RE As our heroes face impending doom, they hang there over a gaggle of hungry cats, knowing that they’re in a tricky position and must use their knowledge and education to save them!