1 (+ object) : to be or create (a possible threat, danger, problem, etc.)
Smog poses a threat to our health. (=smog threatens our health)
His careless behavior poses a hazard to others. (=his careless behavior is dangerous to others)
Physical sports pose a risk of injury.
The weather should not pose a problem for us.
Decreasing the unemployment rate poses a serious challenge to/for the new governor.
2 (+ object) : to ask or suggest (a question)
My mother posed a question to me that I still can’t answer to this day: “What do you want to do with your life?”
The contradictions in his argument pose (=raise) questions about his credibility.
3 : to stand, sit, or lie down in a particular position as a model for a photograph, painting, etc.
(no object) — usually + for
Everyone posed for the group photo.
She posed nude for the magazine.
The photographer posed her on the steps of the courthouse.