Answer: C
Explanation: ash prevents sunlight from reaching the earths surface therefore lowering the temperature.
Biodiversity is a topic of science therefore it is not an example of economics .
Answer: D
Explanation: Wind turbines generate energy by moving. (Kinetic energy is movement.) Wind turbines, in more detail, are pushed by the wind which causes a transfer of kinetic energy which is then converted by the turbine into electrical energy.
C, we went over this today.