Explanation:

The analogy presented is "Gardener : Trowel :: Seamstress : ?". This establishes a relationship where the second term is a primary tool used by the first term (profession). A gardener uses a trowel for tasks like digging and planting. Following this established relationship, we need to identify the primary tool used by a seamstress, who is a person whose profession involves sewing clothes. Option A, 'Scythe', is an agricultural tool primarily used for mowing grass or harvesting crops, not by a seamstress. Option B, 'Crowbar', is a lever tool used for prying or forcing things open, which is unrelated to sewing. Option C, 'Scissors', are an indispensable tool for a seamstress, used for cutting fabric, threads, and patterns. This perfectly matches the established relationship. Option D, 'Saw', is a tool with a toothed blade used for cutting wood or other hard materials, not fabric. Therefore, 'Scissors' is the correct choice as it is the most appropriate tool for a seamstress, maintaining the same relationship as 'Gardener : Trowel'.