Question

which interaction contributes to the greenhouse effect?
gases in the atmosphere absorb heat.
dust particles scatter and reflect light from the sun.
green visible light is trapped in earths atmosphere.
light travels through a thick part of the atmosphere at sunrise and sunset.

Explanation:

The greenhouse effect occurs when greenhouse gases (such as carbon dioxide, methane) in the atmosphere absorb heat (infra - red radiation) emitted from the Earth's surface and re - emit it back towards the Earth. Dust particles scattering and reflecting sunlight would have a cooling effect (like the albedo effect). Green visible light being trapped is not the main mechanism of the greenhouse effect (it's about infrared radiation and greenhouse gases). Light traveling through a thick part of the atmosphere at sunrise and sunset is related to atmospheric optics (like the reddening of the Sun at sunrise/sunset) and not the greenhouse effect.

Answer:

Gases in the atmosphere absorb heat.