question:  Which is not a reason that Stinson decided to journey on the ice by foot [mostly didn't want to leave Sybtl behind on her own and felt important and had some level of curiosity]
context: Stinson lay still in the sand where he fell, gloating over the success of his arrival. He touched the pencil-line scar behind his ear where the cylinder was buried, marveling at the power stored there, power to fling him from earth to this fourth planet of the Centaurian system in an instant. A gray, funnel-shaped cloud of dust stood off to his left. Weather control made cyclones and other climatic phenomena on earth practically non-existent. Dark clouds capped one peak of the mountains on his left. He was here and Earth was somewhere up there. The sun burned fiercely, although he would have said it was about four o'clock in the afternoon, if this had been Earth. The sun shone obliquely, throwing Stinson's shadow upon the sand. He was here to investigate, to determine if this planet was capable of supporting life. When it changed to a cube he drew a square, a circle for a sphere, and so on. He became so absorbed in doing this that he failed to notice how the wind devil drew closer and closer, but when he inhaled the first grains of sand, the realization of what was happening dawned with a flash of fear. As he stood beside a small creek, a chill wind blew from the northwest. The current of warm air flowed toward him and he followed it, cautiously, stepping carefully and slowly. All were dressed from the waist down only, in a shimmering skirt that sparkled as they moved. They had exhibited human emotions of anger, fear and, that most human of all characteristics, curiosity. But up to now the tube and the chain was the only evidence of an advanced technology, unless the ancient inscriptions in the stone wall of the pool, and the statues lining the wall were evidences. It is impossible to move a physical body from one place to another by a mere thought and a tiny instrument, yet you have done so. That is, they did not make it directly. These are the undesirables, the incorrigibles, the nonconformists from the sixth planet.
output:  He preferred to stay near the other people to keep an eye on them
options:  He figured he could not be tracked in this environent  He was drawn to his companion  He preferred to stay near the other people to keep an eye on them  He wanted to feel important for protecting someone