Which question can be tested scientifically? Does humidity affect the decay rate of leaves? How does a biologist become successful? What shape are the flowers of a cherry tree? Are puppies cuter than kittens?

Which question can be tested scientifically?

Does humidity affect the decay rate of leaves?
How does a biologist become successful?
What shape are the flowers of a cherry tree?
Are puppies cuter than kittens?

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