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There are actually only three substances that form natural magnets: iron, nickel, and ____.
Exchange
The act of trading goods, services, or resources between parties, typically in a way that benefits both sides.
Service
Intangible activities or benefits provided to consumers, including assistance, experience, or access, that satisfy a need or want.
Online
Pertaining to activities, transactions, or services carried out over the Internet or connected to being accessible or available through the internet.
Social Media
Websites and applications that enable users to create and share content or to participate in social networking.
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