Final answer:
The correct term for sedimentary rock formed from living organisms' deposits is biogenic rock. This type includes limestone, derived from the calcium carbonate shells and skeletons of marine life.
Step-by-step explanation:
The term for a type of sedimentary rock primarily comprising deposits resulting directly or indirectly from processes and activities of living organisms is c) Biogenic rock. Biogenic sedimentary rocks are formed from the accumulation of organic debris, which can include the remains of plants, animals, and microscopic organisms like foraminifera. Biogenic rocks are formed from the accumulation and lithification of organic matter, such as the shells of living organisms or plant remains.These organisms' remains can form various kinds of biogenic rocks, such as limestone, which is made predominantly of calcium carbonate from the shells and skeletons of marine organisms.