Lynne is digging a hole in which she plans to plant a tree in her yard. The last soil she dug was damp and contained lots of dead bugs and just a few rock fragments. From which soil layer was this soil dug?

A horizon or Topsoil

Explanation:

A horizon or Topsoil is also called the humus layer because it is rich in organic material. This layer consists of small dead animals like bugs, decomposed material and organic matter.

Because of the hummus, the topsoil is soft and porous therefore it allows it to hold enough air and water. This layer is responsible for the germination of seeds and roots of the plants. Also, Many living organisms like earthworms, millipedes, and centipedes, bacteria, and fungi are found in this layer of soil.

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