What refers to an imaginary cost representing what will not be received if a particular strategy is rejected?

The correct choice is opportunity, which is a term commonly used in economics and decision-making. Opportunity cost refers to the potential benefits or value that are forfeited when one alternative is chosen over another. In other words, it represents the income or gain that you give up by opting for a particular strategy or choice instead of the next best alternative.

For instance, if a company decides to invest in a new project, the opportunity cost would be the profits it could have made from other projects that are not pursued as a result. This concept is crucial for understanding trade-offs in limited resource allocation and helps businesses and individuals in making informed decisions.

The other terms or options presented may not accurately convey this economic principle. Ghost cost is not typically used in standard economic terminology, rather it may refer to non-tangible costs that are hard to quantify. Horizon cost usually relates to the timeframe of forecasting cash flows or investment returns, which does not align with the concept of opportunity costs. Null cost suggests a complete absence of cost, which contrasts with the principles behind opportunity cost that asserts that every choice has a cost associated with it.