Q: What element makes up the majority of coal?


Read this paragraph and choose the correct option from the provided answers:

Coal is a black or brownish-black rock that burns easily ( Figure below ). Most coal is sedimentary rock. The hardest type of coal, anthracite, is a metamorphic rock. That is because it is exposed to higher temperature and pressure as it forms. Coal is mostly carbon, but some other elements can be found in coal, including sulfur.

 Choices:

- iron

- lead

- silicon

- carbon


A:
carbon