what term is used to describe the accumulation of a toxic chemical in the tissues of an individual organism…

Answer:

Bioaccumulation

Brief Explanations:

Bioaccumulation refers to the accumulation of a toxic chemical in the tissues of an individual organism over time. Biomagnification, on the other hand, is the increase in concentration of a toxic substance as it moves up the food chain (across different organisms). Since the question specifies the accumulation in an individual organism, the correct term is Bioaccumulation.