 Why did Zarwell deliberately inject himself?
The floor continued its transmutation, and Zarwell sank deep into viscous depths. Zarwell grunted acknowledgment and pushed himself to his feet, apparently unaware that his shirt clung damply to his body. Zarwell was not the leader of the invaders, only a lesser figure in the rebellion. When Zarwell arrived, six months before, the vitalized area already extended three hundred miles along the coast, and sixty miles inland. They were loaded with ore that would be smelted into metal for depleted Earth, or for other colonies short of minerals. After its three-thousand-mile journey across scorched sterile rock, it sucked the moisture from a man’s body, bringing a membrane-shrinking dryness to the nostrils as it was breathed in.
 To forget memories that influence him to join more missions
 To forget memories that influence him to join more missions  To prevent a psychoanalyst from probing his memories  To disguise himself among civilians in a new society  To protect himself from corrupt government officials