Humus is often used by to fertilize the soil. Aside from adding nutrients, it also loosens the texture of the soil. With a freer texture, air and water can more easily penetrate, and oxygen can reach the plant’s root system faster. Some experts also believe it has the ability to prevent plants from getting hit by the disease.
If my memory serves me well, correct answer looks like this: If a material, such as diamond, is very strong but gives way (ruptures) quickly when a crack forms, then it is considered <span>c.brittle</span>.
