Question

Which of the following is most useful for the growth of plants?

a)Humus ( ), b) Sand ( ), c) small rocks ( )​

Answer 1

Answer:

Humus

Explanation:

Humus is a type of organic material. It is present inside the soil in the form of a dark-coloured substance. Humus is formed by breaking down of plant litter that includes dried and fallen leaves, branches twigs etc. along with dead bodies of animals and insects. Over a period of time, all these decompose and cause break down of their complex substances into simple ones. It contains some of the important chemicals required for the soil for its nutrient maintenance.

So, we can say that humus provides nutrients to the soil. Apart from this, in its presence, air and water can percolate through the soil particles easily, increasing its efficiency.

So, option A "Humus" is the correct answer.