Soil forms in , which together make up the soil profile.

Soil forms in layers, which together make up the soil profile

Explanation: Each layer is called a horizon. Called the "A horizon", the topsoil is usually the darkest layer of the soil because it has the highest proportion of organic material.

the answer to your question is slate

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.