Limestone is made of rock and animal shell fragments. it is

a.) a metamorphic rock
b.) an intrusive igneous rock
c.) an inorganic mineral
d.) an organic sedimentary rock

Organic-rich sedimentary rocks are a specific type of sedimentary rock that contains significant amounts (>3%) of organic carbon. The most common types include coal, lignite, oil shale, or black shale.

The correct answer between all the choices given is the last choice or letter D. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

answer; i believe that the correct answer is (lung);