5 Which is NOT a property of the organisms that have become useful index fossils? * (20 Points) A. The organisms existed for a relatively short period of time. B. The organisms existed over a large area. C. The organisms were abundant when they existed. D. The organisms still exist today.

Answer// dinosaurs emerged during mesozoic era;

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.

ddd    idk or c