What does unsaturated zone mean?

The unsaturated zone is the portion of the subsurface above the groundwater table. The soil and rock in this zone contains air as well as water in its pores. ... Unlike the aquifers of the saturated zone below, the unsaturated zone is not a source of readily available water for human consumption

The unsaturated zone is the area above the water table that carries no water

Ibelieve its a because an empirical formula usually has a ch in it your options are a or b