Question

1. what are three common varieties of sedimentary rock?

Explanation:

The question is about sedimentary rock varieties, which falls under Natural Science (Geography or Earth Science subfield). The three common types are based on formation: clastic (from sediment fragments), chemical (from mineral precipitation), and organic (from organic matter accumulation).

Answer:

The three common varieties of sedimentary rock are clastic sedimentary rocks (e.g., sandstone), chemical sedimentary rocks (e.g., limestone), and organic sedimentary rocks (e.g., coal).