ocean-floor sediments are classified into three groups: terrigenous, biogenous and hydrogenous. the classification is based on the of the sediments.

a.
origin

b.
depth

c.
size

d.
density

The correct answer is...

A. Origin or source and type of material

Explanation:

Terrigenous sediments made-up of sediments carried from the land into the ocean by water, wind or ice.

Biogenous sediments contain at least 30% material from once-living marine organisms, especially plankton.

Hydrogenous sediments form when dissolved minerals precipitate or solidify from seawater.

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