This question only applies to you if you lived in a hurricane area and ALL THREE things are true about you. If that is the case then you can choose whichever answer gives you the better refund.
This question is there due to tax-related disaster relief that many taxpayers are eligible to claim.
When you first see the question asking whether your earned income for 2017 was less than your earned income for 2016, you can answer either “yes” or “no”:
If you do qualify for the disaster relief and you choose to use your 2016 earned income to calculate your EITC, be aware that it may or may not result in a higher refund than using your 2017 earned income. You can choose to use the income that gives you the higher amount.