The term "global warming" refers to
a.
the warming of regions of the earth during the summer
b.
increased average temperatures on the earth's surface
c.
changes in temperature as a result of decreased ozone
d.
daily changes in temperature, from sunrise to sunset

the correct answer is !

D.haka is the first answer and a.canberra is the second answer

The correct answer is kettles.

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.