Explain the war of 1812 completely !

The War of 1812 was a military conflict that lasted from June 1812to February 1815, fought between the United States of America and the United Kingdom, its North American colonies, and its Native American allies.

Answer the use of flood plains and irrigation;

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.