Question

Read the following introductory paragraph, which is missing a hook:

Light from the sun hits Earth and warms the planet. The warm soil and water then release some of that heat back into the air. Some of it escapes into space, and some of it is caught and held by gases in the atmosphere. This heat trapping process is called the greenhouse effect, after what the windows in a greenhouse or a car do with solar radiation - they let the light move in and out, but trap a lot of the heat inside.
Which option below makes the most effective hook?

Answer 1

The greenhouse effect is similar to the heating of a greenhouse or car, as it lets sunlight in but reduces the outward flow of heat radiation, resulting in a higher temperature.

Step-by-step explanation:

The hook that makes the most effective introduction for the missing hook is:
The greenhouse effect in a planetary atmosphere is similar to the heating of a gardener's greenhouse or the inside of a car left out in the Sun with the windows rolled up.

In these examples, the window glass plays the role of greenhouse gases, letting sunlight in but reducing the outward flow of heat radiation.

As a result, a greenhouse or car interior winds up much hotter than would be expected from the heating of sunlight alone.