978-1-4222-3341-2

Escadaria Selarón, the world-famous stairs in Rio de Janeiro.

WORDS TO UNDERSTAND

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.