Help me please cuz its due rn. put the correct word in the correct spot

If an improvement creates no significant change in a product’s performance, then it is a(n) ? a0 design improvement. (there are no answer choices)

What is the biggest difference between section breaks and regular page breaks? section breaks are more difficult to add than page breaks. section breaks make it easier for you to view the document as an outline. section breaks allow you to have areas of the document with different formatting. section breaks are smaller than regular page breaks.

What is one reason why indoor air pollution has become an increasing problem.