The main reason that achieving high response rates and limiting selection bias are so important is that they:

I believe the answer is: increasing generalizability

Generalizability refers to the extend that a conclusion of a research could be applicable to different people. As generalizability goes higher, The reliability of the measurement would be increased. and it could easily be replicable even if the test subjects are drastically altered.

earthquake fault lines

answer; regard the action of other people negatively;