- A boulder is a kind of rock
- Weathering means breaking down rocks from a larger whole into smaller pieces by mechanical means
- Hence, breaking down a boulder from a larger whole into smaller pieces is an example of weathering

- Breaking down a boulder from a larger whole into smaller pieces is an example of weathering
- A crack is formed by breaking the whole
- Therefore, cracks will be formed by the weathering of a boulder

Hence, cracks will be formed by the weathering of a boulder
[Question]Which of the following can be caused by weathering?
[Context]- A crack is formed by breaking the whole 
- A boulder is a kind of rock 
- Weathering means breaking down rocks from a larger whole into smaller pieces by mechanical means