The main form of energy used to convert sedimentary rocks into metamorphic rocks in the rock cycle is - C. Thermal.
Metamorphic rocks have been metamorphosed due to thermal energy in the form of heat and/or pressure or stress within the Earth's crust.
- They are crystal-like and have a foliated or banded appearance.
- Metamorphic rocks form from heat and pressure metamorphosed the original or parent rock into a completely new rock.
- The parent rock can be either sedimentary, igneous, or even another metamorphic rock.
Thus, the main form of energy used to convert sedimentary rocks into metamorphic rocks in the rock cycle is - C. Thermal.
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