Which Symbol Completes the Branching Pattern?

Official explanation

Official Community Explanations First of all, I would like to sincerely thank everyone who took the time to solve this puzzle and share their reasoning. We received many excellent explanations, often approaching the same solution from completely different perspectives. Among all the submissions, we selected the following three explanations from the Reddit community for standing out with their clarity and originality. ⸻ 1. jabuchae This explanation stood out because it did not rely on a single rule. Instead, it identified multiple independent patterns across rows, columns and diagonals, all leading to the same answer. Demonstrating that several different observations converge on the same solution makes this one of the most comprehensive analyses submitted. Wow this one has so many patterns! (It’s A) 1. columns rotating 2. rows rotating circle in one direction and thick line in another 3. rows have the circle and thick line in all 3 positions each 4. columns have the circle and thick line in all 3 positions each 5. Each descending diagonal has the circle in the same place for all figures in that diagonal 6. Each ascending diagonal has the thick line in the same place for all figures in that diagonal 7. connect any three by going up down left right (not diagonally) and you’ll have either the circle or the thick line in every position 8. No figure has the same circle and line placement and orientation as any other ⸻ 2. DrAconianRubberDucky This explanation examined the puzzle from several directions. Besides the horizontal rule, it also described consistent vertical and diagonal relationships, showing that the same solution can be verified through multiple independent movement patterns. The answer is A. The double limb moves/rotates clockwise 2 places or 240° between images. The ball/tip moves 1 place or 120° clockwise over subsequent images… If working top to bottom… If moving diagonally from top left… If moving diagonally right to left… 3 rules producing the same last image. ⸻ 3. rmp266 Rather than focusing only on rotations, this explanation first identifies the missing position of the ball by elimination, then determines the thick bar. It is a simple and logical step-by-step deduction that is easy to follow. A. Each row has three models, each model has 3 legs. The ball is on the end of each leg once (leg pointing up, leg pointing left, leg pointing right). The thick leg is also in each leg position once. So the missing model must have the ball at the top leg, because it’s on the other two legs in the other models in that row already. Then I looked at the thick leg to see where it must be in the missing image.