SBI PO 22 Nov 2021 Shift 1 Paper

Select the phrase/connector from the given three options which can be used to form a single sentence from the two sentences given below, implying the same as expressed in the statement sentence.
Global warming has not stopped because of the global pandemic. We have learned that Mother Nature responds positively to our improved behaviour
1. How we have learned
2. Behind global warming
3. While global warming