Explanation:
Incinerators are not helpful in reducing pollution as they produce a lot of ash and smoke so it increases the air pollution by burning of waste.
Solar and wind energy are the clean source of energies replacing the fuels. Catalytic converters reduce the air pollution from the exhaust fumes of vehicles.
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Answer:
A. decomposers transfer nutrients back to the soil
It's C, the catalyst remains unchanged through a reaction.
The answer is pheromones. Hope that helps :)