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When he was younger, Tommy stacked blocks for the sheer joy of doing so. Now, Tommy only stacks blocks when he is trying to build something or when he is playing a game. The term that best describes Tommy's development is:
Sulphur Dioxide
A toxic gas with a pungent, irritating smell, commonly resulting from the burning of fossil fuels and is a significant pollutant in the atmosphere.
Sulphuric Acid
A highly corrosive strong mineral acid with the molecular formula H2SO4, used in a wide variety of industrial processes.
Acid Deposition
The falling of acids and acid-forming compounds from the atmosphere to the Earth's surface, often as rain, snow, or dust, having harmful effects on ecosystems, structures, and human health.
Tar Sand Oil
A viscous form of petroleum found in sand deposits, which requires intensive extraction and processing methods.
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