Final answer:
Infrastructure comprises essential systems such as water, electrical grids, sewer, and transportation. It includes assets like roads, canals, airports, sewage treatment systems, etc., crucial for societal and economic operations.
Explanation:
Infrastructure includes the categories of water, electrical grids, sewer, and transportation. It encompasses assets like roads, canals, airports, sewage treatment systems, and more. Infrastructure plays a vital role in the functioning of a society and economy.
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