Sediments derived form preexisting rocks are called:
a. volcagenic.
b. lithogenous.
c. hydrogenous.
d. biogenous.
e. cosmogenous.

b. lithogenous.

Explanation:

Generally, sediments are formed from preexisting rocks, it might be igneous , metamorphic or even sedimentary rocks . As earth processes(weathering, erosion and wind ) takes place this rocks are broken into smaller particulate matter to form sediments. Sometimes this rocks can form an entirely new substance due to chemical weathering.  Some of this sediments are driven into the sea through erosion and wind.

Lithogenous sediments are preexisting  rocks formed from the land . They are also known as terrigenous rocks. Sometimes due to erosion and weathering, some of this sediment might find their way to the ocean floor .

Due to the mode of formation or earth process that forms this lithogenous sediments the texture and sizes varies.  Some of the particulate matter are fined and tiny while some are coarse and rough in texture.