The photograph shows a recyclable box designed for transporting cold food.

layered cardbc

The box has these design features

thick walls made from several layers of cardboard with air trapped between the layers

a thick lid made from layers of cardboard $.$Cold food and ice packs are placed in the box.

$($a$)$ Give a reason why there is a net transfer of energy from the outside of the box to the inside of

the box during transportation in a hot country.

$($b$)$ Explain how the box is designed to reduce energy transfer by convection.

$($c$)$ A student suggests that painting the inner surfaces of the box a different colour would

help to reduce the rate of energy transfer to the cold food. Explain which colour the inner

surfaces of the box should be painted.