The Carbon Cycle Questions1.In the diagram, add arrow and labels to indicate the following activities(a)Dissolving of limestone by acid rain(b)Drilling for oil reserves(c)Burning of plant materials2.Describe the biological origin of each of the following geologicdeposits (use Google or Wikipedia)(a)Coal: Coal usually forms from buried tissues of higher plants.Most of Earth's coal originated as trees, ferns, and other tropicalforest plants that lived in a warmer time in our history.(b)Oil: Oil mostly originated as very simple organisms – such asbacteria, algae and plankton. This organic matter – and often thesandstone or limestone beds that hold the oil – was deposited inmarine or lake basins, and in the ocean.(c)Limestone: It is believed that limestone has existed for more than 3 billion years, since the Precambrian times. Shallow seas provided the ideal breeding ground for calcium carbonate, which begins life underwater as a result of an accumulated biological deposit.