Which term is associated with the act to sow?

The term most closely associated with the act to sow is "seed." Sowing refers to the process of planting seeds in the ground in order to grow crops. This action is foundational in agriculture, as it is the beginning of the plant growth cycle.

Seeds are the reproductive units of flowering plants and contain the necessary genetic material for the growth of new plants. When sowing, farmers or gardeners place seeds into the soil to start the process of germination and ultimately crop production.

In contrast, "plant" generally refers to the act of putting a young plant (a seedling or more mature plant) into the ground, whereas "harvest" pertains to the gathering of mature crops when they are ready for collection. "Gill" usually relates to a respiratory organ in fish and hasn't a relevant connection to sowing. Thus, the fundamental relationship between sowing and seed makes this the correct choice.