Question

1. what kind of material is found in the c horizon of a soil profile? partially weathered parent material hardpan mineral and organic matter clay particles

Explanation:

The C horizon of a soil profile consists of partially weathered parent material. Clay particles are more associated with the B horizon (subsoil), mineral and organic matter are in the A horizon (topsoil), and hardpan is a compacted layer, not typical of the C horizon.

Answer:

The option with "partially weathered parent material" (the right - most option among the four visible options in the image).