"When do you eat breakfast?"
Translation:Kiedy jecie śniadanie?
a) jesz is you singular eat, jecie is you plural eat
b) kiedy śniadanie jecie is gramatically correct but feels weird/uncommon and I cannot right now imagine context for it
c) "normal" word order, when there are all nouns no pronouns, no skipped pronouns: Subject Verb Object
question : Question word Subject Verb Object
when subject is skipped sometimes adverbs or object go first, when object is pronoun it's position often changes, so it is not left at the end.
Most word order changes keep sentences grammatically correct but emphasise some words, or give "poetic feel". Unbreakable rules include nor splitting "nie" and verb, and not splitting preposition with an object ( noun, pronoun, adjective+noun etc- in me, on black door, about my sister, with what )