Select the most appropriate option that can substitute the underlined segment in the given sentence. If there is no need to substitute it, select 'No substitution'.
Greenhouse gases trapped beside Earth's atmosphere cause global warming.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. trapped inside.
"Trapped inside" accurately describes the confinement of greenhouse gases within the Earth's atmosphere. It effectively communicates that the gases are contained within the atmospheric layer.
Hence, the chosen option is the correct answer.