Topsoil see concept 37.1 (page 804) topsoil see concept 37.1 (page 804) does not retain water is uniform in texture is devoid of charged particles is the relatively inert upper layer of soil is a mixture of rock fragments, living organisms, and humus

Answer;

is a mixture of rock fragments, living organisms, and humus

Explanation;Topsoil refers to the top layer of soil that is high in organic matter and nutrients, formed by the slow weathering of rocks and decaying organic matter over thousands of years.Topsoil is made up of organic matter, microbes, water and insects that are all needed to ensure cycling.Topsoil is used as the medium for all plant growth, whether it is a lawn, garden or prairie.

The titanic is the answer