Question

multiple choice question
abyssal ______ is pelagic lithogenous sediment that accumulates very slowly on the deep-sea floor.

○ plaque
○ clay
○ mud

Explanation:

To solve this, we analyze the options:

• "plaque" is related to dental or bacterial films, not deep - sea sediment.
• "abyssal clay" is a well - known type of pelagic lithogenous sediment that accumulates slowly on the deep - sea floor.
• "mud" is a more general term and not the specific term for this type of deep - sea sediment.

Answer:

B. clay