Which of the following is not one of the three important developments that was made in agriculture in the past years? A. a growing labor force 1 B. the use of biotechnology C. increased mechanization D. the development of agriculture as a business ​

The correct answer is A.

Explanation:

Becuase there was always a large labor force for the agricultural industry so this has not been a major development over the past 50 years.

Yes it does it sure does me later

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.