The correct answer is a mixture.Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. A mixture is a substance that consists of two or more elements or compounds not chemically combined together.For Example - Air is a mixture of gases like oxygen, nitrogen, argon, CO2, and water vapour.Homogeneous and Heterogeneous are types of mixtures.The layer of soil on Earth's surface is called the pedosphere.The study of soil is called pedology.?Additional InformationA Compound is when two or more element atoms combine together by either giving up electrons or sharing them.An atom is the smallest unit of matter.Matter is anything that takes up space and volume, atoms consist of a nucleus of protons and neutrons surrounded by electrons. An element is a pure substance that can not be separated into a simpler substance by physical or chemical means.