Akind of sedimentary rock formed from plant material over a long period of time is

a.

limestone

b.

cementation

c.

coal

d.

compaction

A kind of sedimentary rock formed from plant material over a long period of time is : Coal
In order for coal to be created, it needed a lot of decomposition from dead organisms, such as dead plants and animals. our nature need million of years before it could naturally transform the dead substances into a flammable substance such as coal and oil

The answer is joseph is observing the colour of the reaction mixture to see whether proteins are present in the given solution.

Cis your correct answer