Step 1: Analyze the sentence.
The sentence talks about a move to reduce or stop something related to the burning of fossil fuel, followed by the action regarding new thermal power stations. This suggests the first word should reflect a decrease or limitation, and the second should imply the initiation of something new.
Step 2: Evaluate the options.
(a) "Curbing" means reducing or limiting, which fits with the idea of controlling fossil fuel burning. "Setting up" fits with the idea of creating new thermal power stations.
(b) "Differentiating" and "Making" do not fit well with the context of reducing fossil fuel burning and starting new projects.
(c) "Helping" and "Installing" are not contextually appropriate in this situation.
(d) "Finishing" and "Arranging" do not convey the correct action in the context of stopping burning and creating new power stations.
Step 3: Final Answer
The correct answer is (a) Curbing, Setting up.
Final Answer: The correct answer is (a) Curbing, Setting up.