Which materials typically make up the a horizon in soil?

a.) silt and pebbles

b.) sand, silt, and clay

c.) sand, silt, and pebbles

d.) sand, clay, and pebbles

B). Sand, silt and clay

Explanation:

A horizon is a layer that lies parallel to the earth crust. A horizon is a type of horizon which lies below the O horizon. It involves the process of mineralization. It includes fine particles which deposit as a result of weathering process of rocks. Thus it is expected to exhibit sand and silt. The clay is a type of soil that includes organic matter deposit as a result of decay of the plant and animal matter.

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