(a) swell at low moisture content
(b) spongy in nature
(c) shrink with increasing moisture content
(d) none of these
Answer: (b) spongy in nature
Explanation: Presence of organic matter in soil makes it spongy in nature. In addition to providing nutrients and habital to organisms living in the soil, organic matter also binds soil particles into aggregates and improves the water holding capacity of soil. Most soils contains 2-10% organic matter.
