Which statement is correct? (1 point)
Responses
A. There is a thin layer of topsoil in temperate areas.
B. There is a thick layer of humus in dry deserts.
C. There is a thin layer of topsoil in tropical rain forests.
D. There is a thick layer of humus in cold deserts.
C. There is a thin layer of topsoil in tropical rain forests.
C. There is a thin layer of topsoil in tropical rain forests.
To determine the correct statement about the soil composition in different regions, we can analyze each option individually.
A. Statement A claims that there is a thin layer of topsoil in temperate areas. To verify whether this statement is correct, we need to understand what topsoil is and where it is typically found. Topsoil is the uppermost layer of soil, rich in organic matter and nutrients. It is crucial for plant growth. While it generally varies in thickness depending on factors such as climate and terrain, it is more likely to be thicker in temperate areas due to the presence of vegetation and favorable conditions for soil development. Therefore, statement A is not correct.
B. Statement B suggests that there is a thick layer of humus in dry deserts. Humus is the organic component of soil resulting from the decomposition of plant and animal matter. Deserts, particularly dry ones, usually have limited vegetation and organic material, which makes it unlikely for them to have a thick layer of humus. Therefore, statement B is not correct.
C. Statement C states that there is a thin layer of topsoil in tropical rain forests. Tropical rain forests are known for their lush vegetation and high biodiversity, which contribute to the accumulation of organic matter and the development of thick topsoil layers. Hence, statement C is not correct.
D. Statement D claims that there is a thick layer of humus in cold deserts. Cold deserts, such as those found in high-altitude regions, may have sparse vegetation but could still have significant amounts of organic matter due to slow decomposition rates in cold temperatures. This can result in the accumulation of humus, making statement D correct.
Based on the analysis, the correct statement is D. There is a thick layer of humus in cold deserts.