Sentence Completion Regarding Global Warming

Hi Medine, let's solve this multiple-choice sentence completion question together.

Let's first analyze the main clause provided in the question. It states that it is likely that the average global temperature will have increased by about two degrees Celsius by the end of this century. This is a prediction about global warming.

Now, let's look at option A. It begins with: Given the current amounts of greenhouse gases and the fact that they are still being released. In English grammar, the word given means considering, in view of, or taking into account.

When we combine Option A with the main clause, we get a perfect cause-and-effect relationship. Specifically, because of the current amounts and ongoing release of greenhouse gases, it is likely that the temperature will rise. This makes perfect logical sense.

Let's rule out the remaining options to be absolutely sure. Let's look at option B: As climate change poses an immediate and possibly irreversible threat to human societies and Earth.

Option B suggests that because climate change is a threat, the temperature will rise. This is backward logic, because the temperature rise is the cause of the threat, not its result.