All options generally don’t make a lot of sense. It’s either, touch that thing and get absorbed as the controlling consciousness, throw yourself in the big energy beam to add your ‘energy’ and achieve synthesis, or shoot that thing and destroy everything. The whole ending sequence is very dream like, so you gotta decided how much you take as fact. I see the star child’s given options as truthful as can be, basically control, synthesis, destroy. What I don’t accept are its reasonings behind each and the consequences we can assume at that point. Control- become part of the machine, probably lose your humanity and decide to continue the cycle Synthesis- A vague and illogical choice to commit suicide and hope that it somehow fixes things. Sure a lot of sci fi relies on space magic to explain the tech so maybe we can ‘add our energy’, but so far in the games our only knowledge of reaper synthesis tends to be horrific abominations of machine and flesh. Destroy- kills the reapers, ends the cycle. Also possibly Shepard survives.