How are tree roots and ice mechanically weather rock similar?

Tree roots and ice both contribute to mechanical weathering of rock through a process of expansion and pressure. As tree roots grow, they can penetrate into cracks and crevices in rocks, exerting force that eventually breaks the rock apart. Similarly, when water infiltrates these cracks and freezes, ice expands, exerting pressure on the surrounding rock and causing it to fracture. Both processes illustrate how natural forces can gradually break down solid rock into smaller particles.