Soil is defined as the soil phase consisting of minerals, organic compounds, and a porous phase that holds gas molecules.
The factors that determine the orders of soil are:
The variables of climate such as aridisols and gelisols determine the order of the soil. Aridisols refer to the lack of precipitation, and gelisols refer to the permafrost.
Plant types or the prevalent vegetation like mollisols and alfisols also determine the order of the soil.
Type of parent material also determines the soil orders, such as andisols refers to black soil formed from volcanic ash or ejecta, whereas, vertisols are the soil that changes moisture content in response to climate.
Thus, the correct answers are climate, plant type, and composition of soils.
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