Six ways by which climate and vegetation influence soil formation are:

The action of rainfall causes erosion which breaks down rocks into tiny pieces.
Rainfall also weakens rocks resulting in the breakage of such rocks.
Temperature causes the expansion and contraction or rocks resulting in the breakage of rocks.
The action of wind (wind erosion) also helps to break down rocks.
The roots of plants penetrate rocks thereby breaking the rocks into tiny pieces.
The leaves that fall from trees decay and help to form organic manure (humus) in the soil.