Accurate answer: Figure A rotates 90 degrees to the right around point O, and then translates 4 squares to the right to get Figure B, (or: Figure A translates 4 squares to the right and then rotates 90 degrees to the right around point O to get Figure B ...)
This part is the knowledge of the second volume of the fifth grade of the primary school mathematics education edition.
Mathematics is a very rigorous subject, so whether my answer can be adopted or not, please give an accurate and detailed answer. If you don't specify that it is rotating around the O point, this problem can't be calculated accurately.