Question

how did britain let 250,000 under-age soldiers fight in ww1?
question/rhetorical question
definition
description

Explanation:

The sentence "How did Britain let 250,000 under - age soldiers fight in WW1?" is in the form of a question as it is asking for information about how Britain allowed under - age soldiers to fight in WW1. It is not a definition (which would be explaining what a term means) nor a description (which would be giving details about a thing or event in a non - question - asking way). And since it is seeking an answer rather than being a rhetorical question (which is more for effect and not expecting an answer), it is a question.

Answer:

A. Question/rhetorical question