More why questions

Having chosen a Richard Scarry book to read: “Why I chose that book?”
Having dumped mud on the stairs: “Why I did that?”
Why cats and dogs have tails?
Why God made us?
Why lava is hot?
Why Connor has no teeth?
Why those trees are there?
Why aminals are naked?
Why you have never seen a bus pulling a car?
Why tractors are noisy?
Why you said “ewww”?
Why we can’t reach the sky?
Why we can’t stand on the sky?
(Several days later): "Why the sky can't hold us up?"