Which of the Following Best Matches the Description

Which of the following best matches the description?
-The way soil particles clump together.

A) weathering
B) parent material
C) friable
D) soil profile
E) humus
F) chemical weathering
G) terrace
H) soil structure
I) terrace.
J) mechanical weathering
K) leaching
L) contour farming
M) loam
N) horizon
O) windbreak
P) soil texture
Q) lithosphere
R) asthenosphere