Answer: Chemical weathering
Step-by-step explanation:
Chemical weathering can be defined as the process in which the chemicals in the air and in the rain cause the disintegration of the structure of rock and break them into pieces.
The Thor's Hammer in Bryce Canyon National Park is a monument made up of red stones. This monument is experiencing the chemical weathering due to the oxidation of the rock iron content. This causes disintegration of the structure and causing chemical weathering of the rock.