They are electromagnetic waves because mechanical waves have to be physically created by something, while electromagnetic waves are just emitted without any effort or force.
Answer:
The correct answer is C. This maps represents the triangle trade.
Explanation:
The triangular trade was a slave trade in which manufactured goods such as alcohol, metal containers, clothing and firearms were transported from Great Britain (especially Liverpool). Cargo transported in Africa was exchanged for slaves transported to America or the West Indies. The slaves were replaced with sugar, cotton, rum and tobacco. For the shipowner, the deal was risky but very profitable. Each stage was profitable and the cost of the ship could be recovered in just a few trips. The triangle trade was practiced on a full scale since the 17th century and reached its peak in the late 18th century.
The Sydney opera house is in Australia (:
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