Concept:Soil texture describes the proportion of sand, silt and clay particles present in a sample of soil.
Solution:Soil texture is based on the relative amounts of the different mineral particles that make up the soil.
It does not describe the amount of water soil can hold, so option A is not correct.
It is also not the arrangement of soil particles, because that is called soil structure, so option B is not correct.
Option D only says the particles are mixed; texture is about how much of each size (sand, silt, clay) is present.
Therefore, soil texture refers to the proportions of sand, silt and clay in a given soil sample.
This matches option C.
Answer:Option C (proportions of sand, silt and clay in a sample of soil)