"Poses" is to tell what he does now. "Posing" is to emphasize what he does right now. Riding a sled is to sit on the sled, so the child is "on" the sled.  (Typo on your sentence 2: sled not shed)


Given the statement "A child in orange poses in the snow riding a blue sled.", is the statement "A child is posing on a blue shed." wrong?
- Yes
- No
- Unknown