Explanation:

- Limestone is a sedimentary rock, often formed from skeletal fragments of marine organisms.

- Marble is indeed a metamorphic rock. It forms when limestone undergoes metamorphism through heat and pressure.

- Shale is another type of sedimentary rock, made up of clay minerals and tiny fragments of other minerals.

- Halite, commonly known as rock salt, is a sedimentary rock, formed through the evaporation of saline water.