where could convection currents form? in a sand dune on a pavement in the atmosphere in outer space

where could convection currents form? in a sand dune on a pavement in the atmosphere in outer space
Answer
Brief Explanations:
Convection currents form in fluids (liquids or gases) due to differences in temperature and density. The atmosphere is a gaseous medium where such temperature - density differences occur, enabling convection. Sand dunes and pavements are solids and outer space is a vacuum, so convection cannot occur there.
Answer:
C. in the atmosphere