NYT Connections puzzle hint and answers for Sunday, September 10 (#91)

pcgamer.com:

There's a hint for every one of today's Connections groups ready and waiting for you just below, giving you just the nudge you need to win. Or if you're running out of guesses and need a guaranteed save, hop on over to the answers to the September 10 (#91) puzzle. It's entirely up to you.

Today's Connections went from smooth to what felt like a full stop at the halfway point, the link between remaining words something of a mystery to me. They would've probably stayed that way too if I hadn't had enough spare guesses remaining to puzzle out that final eight—that was a close one.

Yellow: These are all animals, specifically the sort you're most likely to see in a zoo. Unless you're reading this from the middle of a rainforest, anyway.

Green: Tables, chairs, and even the tallest buildings all have something along these lines on them. You can't have a top without a…?

Blue: There's a good chance you know the words to at least one song from these seemingly unrelated words. Think of spotlights and stages.

Purple: Salty air, vast expanses of water, and sandy shorelines connect these four. There's just one word missing from all of them.  

Don't scroll any further until you're ready for the full answers!

Yellow: Anaconda, Capybara, Jaguar, Toucan (Amazon animals)

Green: Base, Bottom, Foot, Foundation (Lowest point)

Blue: Company, Grease, Hair, Rent (Musicals)

Purple: Change, Cucumber, Legs, Lion (Sea ____)

Connections is the NYT's latest popular puzzle game where you have to find the common thread that ties four seemingly unrelated words together. Can you find all four increasingly challenging groups of words before you make four mistakes? Don't forget: every day only has one solution even if some words look like they could