silt, pebbles, and clay. sand, rocks, and clay. humus, clay, and sand. clay, silt, and rocks.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The best soil mixture for plant growth and drainage is
Possibilities:
- silt, pebbles, and clay.
- sand, rocks, and clay.
- humus, clay, and sand.
- clay, silt, and rocks.

humus, clay, and sand.