Which of the Following Best Matches the Description

Which of the following best matches the description?
-Process of breaking up large particles by physical forces.

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