The method of extraction used to obtain calcium from its ore is Reactivity
and extraction method.
What is Extraction?
This process involves the separation of a substance from a matrix.
Elements which are abundant in the form of ores are usually extracted.
Calcium ore is found in the Earth and can be extracted using reactivity
methods in which the pure is gotten after series of chemical reactions in
suitable environment.
Read more about Extraction here https://brainly.com/question/982069
