Question

During winter mornings why do people stand in the Sun? Explain.

Answer 1

In winter, the temperature of the atmosphere in the mornings is very less than our body temperature. We know that heat always flows from a hot body to a colder one.
So, heat from our body flows to the atmosphere. That's why we feel quite cold.
If people stand in the sun in morning, the heat from the sun reaches their bodies, preventing the flow of heat from their bodies to the atmosphere.
People feel warm if they stand in the Sun.