Final answer:
Rowan was assigned the task of gardening while Scythe Faraday went gleaning alone in the novel Scythe by Neal Shusterman.
Step-by-step explanation:
The job that Rowan was assigned while Scythe Faraday gleaned alone for a day was gardening. In the novel Scythe by Neal Shusterman, Rowan, alongside Citra, is taken as an apprentice to Scythe Faraday. The apprentices are expected to learn various skills and perform tasks while under the tutelage of their Scythe mentor. When Faraday goes to glean alone, he often leaves behind tasks for them to do.
On this particular day, Rowan's responsibility was to tend to the garden, which includes tasks like weeding, planting, and general upkeep of plants. This reflects the balance of life and death that is a theme within the book as scythes are responsible for bringing death in a world where natural death no longer occurs.