A greenhouse is a structure made of a transparent material which regulates the temperature in which plants grow. This structure gets warmer than the outside temperature with the sunlight to protect the plants when it is cold. A car with its doors closed and its windows rolled up acts like a greenhouse because when a car is in a parking lot with the doors closed and the windows rolled up, the sun's rays make it hotter than the temprature outside because the heat is absorbed by the carpets, the seats and when they release it, it can't get out and this increases the temperature inside the car which is what happens in a greenhouse.
I can say that a car with its doors closed and its windows rolled up acts like a GREENHOUSE. The answer would be option D. What made me say that it is like a greenhouse because aside from the protection it gives from too much heat from the sun, this also enables to regulate the temperature inside the car. Hope this helps.
