Which part of the solar cooker

(c).

Explanation : Green house effect in a region occurs when heat radiation (infra-red radiation) are trapped in that region. When sunlight enters the

solar cooker through a glass sheet, then the objects inside the solar cooker emit heat radiation (or infra-red radiation) due to their increased

temperature. These radiations have long wavelengths and hence less energy. Therefore, they cannot pass through the glass sheet. Hence,

interior of the solar cooker becomes warm due to the trapping of these radiation.