The Layer of Soil That Is a Mixture of Minerals

question 16

Multiple Choice

The layer of soil that is a mixture of minerals and organic material is the

• A)O horizon.
• B)A horizon.
• C)humus.
• D)E horizon.
• E)primary layer.

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Definitions:

Causal

Pertaining to the relationship between cause and effect, indicating that one event is the result of the occurrence of the other event.

Prospective Studies

Research studies that follow participants over time to observe outcomes, such as the development of diseases, based on earlier exposures or risk factors.

Retrospective Studies

Research studies that analyze past data to assess outcomes and factors affecting them.

Evidence

Information or facts that help to establish the truth or validity of a belief, proposition, or phenomenon.