Answer :
The correct answer is option D The greenhouse effect
What is the greenhouse effect?
- Solar radiation travels toward the earth.
- About half of the radiation is reflected or absorbed by clouds and the atmosphere.
- The rest of the radiation reaches the earth and gets absorbed by oceans and land.
- The earth also releases heat back toward space; some of this heat passes directly through the atmosphere.
- However, most of it is captured and retained by greenhouse gases like Carbon dioxide, Methane, Nitrous oxide... etc.
- This phenomenon is known as the Greenhouse effect.
What keeps the earth relatively warm at night?
- At night, the Earth's surface gets cools by releasing heat back into the air.
- However, some of the heat is trapped by the greenhouse gases in the atmosphere and keeps our Earth warm.
- Therefore, we can say that the Greenhouse effect keeps the earth relatively warm at night.
Hence, Robin can write about the greenhouse effect which keeps the earth relatively warm at night.
So, option D The greenhouse effect is the correct answer.
Learn more about the Greenhouse effect at https://brainly.com/question/19521661
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