question:  What motivates Zarwell to take on the 'missions' he leads?
context: [p 135 ] By CHARLES V. DE VET monkey on his back Under the cloud of cast-off identities lay the shape of another man— was it himself? Illustrated by DILLON HE was walking endlessly down a long, glass-walled corridor. The truth lurked in some corner of his consciousness, but it was not reached by surface awareness. The corridor opened at last into a large high-domed room, much like a railway station or an air terminal. At the first turn he saw that the aisle merely circled the stairway, coming out into the depot again on the other side. It took him only a few seconds to push the case into the compartment, lock it and slide the key along the floor beneath the locker. But the fact that they had been expecting him meant that others would very probably be waiting outside. The floor beneath Zarwell’s feet assumed abruptly the near transfluent consistency of a damp sponge. The floor continued its transmutation, and Zarwell sank deep into viscous depths. ZARWELL found himself standing on a vast plain. He should know all about the instrument, its purpose and workings, but he could not bring his thoughts into rational focus. Zarwell grunted acknowledgment and pushed himself to his feet, apparently unaware that his shirt clung damply to his body. Zarwell was careful not to rest his hand on the flesh searing surface of the stone. The evening meal hour was approaching when he reached the Flats, on the way to his apartment. Zarwell passed a group of smaller children playing a desultory game of lic-lic for pieces of candy and cigarettes. Zarwell moved among them, seldom taking part in the individual clashes, yet a moving force in the conflict . Zarwell was riding a shaggy pony outside a high wall surrounding the stricken metropolis. He moved in and joined a party of short, bearded men, directing them as they battered at the wall with a huge log mounted on a many-wheeled truck. Zarwell was not the leader of the invaders, only a lesser figure in the rebellion.
output:  He is not consciously aware of why he agrees to participate in the missions
options:  He desires to eradicate the galaxy of authoritarian regimes  He is not consciously aware of why he agrees to participate in the missions  He enjoys the adrenaline rush of the precarious situations his missions place him in  He wishes to prevent Earth from being destroyed by man-made climate change