Final answer:
The stage of risk assessment involving qualitative receptor analysis is the Risk Analysis phase. In this phase, various factors affecting risk, such as environmental and social impacts, are evaluated qualitatively or quantitatively.
Step-by-step explanation:
In the stages of risk assessment, the phase that involves qualitative receptor analysis is Risk Analysis (B). Risk Analysis is the portion of the process where you identify hazards and characterize risks through qualitative or quantitative measures, including assessing the biology of species, environmental impacts, social and economic consequences along with public health issues. This phase goes beyond the initial Risk Identification, as it evaluates the risk associated with introducing new species like pine invasions, taking into account the likelihood of invasive events and their potential consequences, a concept noted by the National Research Council in 2002.