Examlex
What causes geographic isolation for one kind of organism may not be isolating for another kind of organism.
Specialization
The practice of focusing production on a limited range of goods or services to gain efficiency.
Trade
The exchange of goods and services between parties, which can occur within an economy (domestic trade) or between economies (international trade).
Opportunity Cost
The financial sacrifice involved in overlooking the closest alternative when a choice is made or one option is favored over another.
San Francisco
A major city in California, USA, known for its iconic Golden Gate Bridge, steep streets, and vibrant cultural history.
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