2. Which type of sedimentary rock is Limestone? O Crystalline
O Organic
Inorganic
O All of the above

All of the above but organic would probably be the most picked

The answer is c, i, iii, and iv. this is because farming and mining deal with harvesting raw materials, construction work falls under manufacturing, and piloting a plane is a service. ii is wrong because making bread is using  raw materials to produce goods, which would fall under the secondary sector, not primary.