Which is an example of physical weathering?(1 point)

Question

Responses

microscopic organisms producing compounds that break down rock
microscopic organisms producing compounds that break down rock

a crack in rock growing larger as water freezes in it
a crack in rock growing larger as water freezes in it

lichen releasing a weak acid that dissolves rock
lichen releasing a weak acid that dissolves rock

bits of iron in rock rusting when exposed to oxygen and water

Answer 1

a crack in rock growing larger as water freezes in it