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natural resources
: naturally occurring materials, such as oil,
coal, and gold, that can be used by people.
ramshackle
: in a state of severe disrepair.
symmetrical
: exhibiting the same layout on both sides of a
central dividing line.
tributary
: a stream or river that flows into a larger river.
WORDS TO UNDERSTAND
Escadaria Selarón, the world-famous
stairs in Rio de Janeiro.