aspect, viewpoint, opinion

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

(archaic) second-person personal pronoun: you

human / person / people / individual / man / woman / someone

each person

(informal) no problem

unthinkable, out of the question

practical question (problem)

matter of life or death / (idiomatic) an extremely urgent matter

viewing as a problem