question:  Which of these is true about the importance of alge to the Martians?
context: Should any groundsman dispute the importance of belly-furniture in history—whether it be exterminating whales, or introducing syphilis to the Fiji Islanders, or settling the Australian littoral with cross-coves from Middlesex and Hampshire—he is referred to the hundred-and-first chapter of Moby Dick , a book spooled in the amusement tanks of all but the smallest spacers. I trust, however, that no Marsman will undertake to review this inventory of refreshment more than a week from groundfall. The Triton made her underwater periplus of Earth with a galley stocked with frozen pizza and concentrated apple-juice. Four officers and twenty-one Other Ranks were rescued from the Ajax in deep space, half dead from deuterium poisoning. And for a third footnote to the ancient observation, "God sends food, and the Devil sends cooks," Marsmen will recall what happened aboard my ship the Charles Partlow Sale . In no special hurry, we were taking the low-energy route to Mars, a pathway about as long in time as the human period of gestation. Cooking aboard a spacer is a job combining the more frustrating tensions of biochemistry, applied mycology, high-speed farming, dietetics and sewage engineering. This isn't just a paragraph from the Spacer Union Contract. Twelve tons of water, oxygen, and food would have filled the cargo compartments to bursting, and left a small ship like the C. P. Sale no reason to reach for Mars. By allowing a colony of Chlorella algae to work over our used air, water and other effluvia, though, three tons of metabolites would see us through from Brady Station to Piano West and back. Even the stubble from our 2,680 shaves and the clippings from our 666 haircuts en route and back would be fed into the Chlorella tanks. The algae—dried by the Cook, bleached with methyl alcohol to kill the smell and make the residue more digestible, disguised and seasoned in a hundred ways—served as a sort of meat-and-potatoes that never quite wore out.
output:  The nickname for their species is inspired by the reliance on alge
options:  It is the only thing they can eat  All of the spaceships are named after different species of alge  Most of the economy is geared around growing and collecting alge  The nickname for their species is inspired by the reliance on alge