What did Twilly do after sending the kids on the helicopter?

The correct choice highlights that after sending the kids on the helicopter, Twilly took action by packing up the camp and traveling south. This decision suggests a purposeful move to either follow the trajectory of the helicopter or to seek out a new path that he believes is more appropriate given the circumstances. It reflects a sense of responsibility and leadership on Twilly's part, indicating he recognizes the importance of ensuring the kids' safety while also managing his own direction in the situation. Such actions show his proactive nature and his ability to adapt to the moment’s demands.

Other choices suggest different actions, but they do not align with the indicated progression in Twilly's journey. Returning home immediately implies a lack of engagement with the ongoing events, setting up a new campsite suggests a delay in resolving the situation with the children, and attempting to find the kids directly might imply an inability to take decisive action regarding logistics. Twilly's choice to pack up and move south demonstrates a strategic approach to the unfolding scenario.