a pulley a wedge an inclined plane a wheel and axle
I gave my students this multiple choice question: Turgor pressure in the cells of plant roots is strong enough to eventually crack the rocks in which they grow. What machine redirects force this way?

Only one answer is correct among these 4 choices:
- a pulley
- a wedge
- an inclined plane
- a wheel and axle

Could you tell me which one is correct?

a wedge