Select an incorrect statement :

Question

Accepted Answer

Option 3 is the correct answer because it states that "Sun, water and wind has no role in formation of soil," which is incorrect. In reality, sun, water, and wind play significant roles in the formation of soil. Here's how:

1. **Sun**: The sun contributes to soil formation through the process of weathering. Temperature changes caused by sunlight can lead to the expansion and contraction of rocks, eventually causing them to break down into smaller particles, which contribute to soil formation.

2. **Water**: Water is a crucial agent in both chemical and physical weathering. It can dissolve minerals in rocks, leading to chemical weathering, and it can also cause physical weathering through processes like freeze-thaw cycles, where water seeps into cracks, freezes, expands, and breaks the rock apart.

3. **Wind**: Wind contributes to soil formation by eroding rocks and transporting fine particles from one place to another. This process, known as aeolian processes, helps in the distribution and deposition of soil particles.

Now, let's explain why the other options are correct statements:

1. **Option 1**: "Lichens and Mosses help in the formation of soil." This statement is correct because lichens and mosses are pioneer species that colonize bare rock surfaces. They produce acids that chemically weather the rock, contributing to soil formation. Additionally, when they die and decompose, they add organic matter to the developing soil.

2. **Option 2**: "Humus is a major factor in deciding the soil structure." This statement is correct because humus, which is the organic component of soil formed by the decomposition of leaves and other plant material, significantly influences soil structure. It improves soil fertility, water retention, and aeration, which are crucial for plant growth.

4. **Option 4**: "The mineral elements that are found in a soil depends on its parent rock, from which it is formed." This statement is correct because the composition of the parent rock determines the mineral content of the soil. As the rock weathers and breaks down, its minerals are incorporated into the soil, influencing its characteristics.

In summary, Option 3 is the incorrect statement because it inaccurately claims that sun, water, and wind have no role in soil formation, whereas they are actually vital contributors to the process.