Which core strategy in a pilates workout? part 2

This is video 2 in a six-part sequence in which we ask you to choose which core control strategy the exercise focuses on. There can be more than one strategy to focus on at a time. See if your answer agrees with ours!
Exercise time stamps
0:59 Reverse chair sit (asymmetric)
2:55 Split squat
5:36 Quad stretch
7:28 Rolling Sir Galahad
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