> これには砂糖が含まれていますか

I don't see a reason for this to be passive. Isn't it just asking if a
grammatical subject is performing an action? I don't see that anything is
being done to the subject marked with が.

Shouldn't

> これには砂糖が含んでいますか

work just fine?

If they're equally valid, what's the difference in meaning/nuance?

**Edit** : DeepL and Google give an identical translation for both: "Does this
contain sugar?" My question is why would that require passive?
CC BY-SA 4.0
2020-07-12T01:12:53.580
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2021-01-04T20:40:33.803
2021-01-04T20:40:33.803
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question
passive-voice
Why is this sentence passive?
> これには砂糖が含まれていますか。

含まれ(る) here is passive. It literally means "In this, is sugar contained?"

> これには砂糖が含んでいますか。

is incorrect. You could instead say:

> これは砂糖を含んでいますか。

which literally means "Does this contain sugar?"
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2020-07-12T02:26:50.167
78543
2020-07-12T02:26:50.167
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answer