What type of tank receives fluid from the soil and waste drain line?

The type of tank that receives fluid from the soil and waste drain line is a holding tank. A holding tank is designed specifically to temporarily store wastewater or sewage that is collected from various sources, including household plumbing systems. Its primary function is to hold this fluid until it can be transported for treatment or safe disposal.

In contrast, other types of tanks serve different purposes. A storage tank is typically used for holding stable liquids or chemicals, but not specifically for wastewater. A separation tank is designed to segregate different substances within a fluid, which is not the primary function when dealing with wastewater from drains. A transfer tank is used for moving liquids from one place to another, rather than holding them. Thus, the defining characteristics and function of the holding tank make it the appropriate answer for this question.