Francisco Pizarro was born in Spain in 1476. In 1513 he joined Vasco Nunez de Balboa in his march to the "South Sea". He discovered the Pacific Ocean. In 1532, Him and his brothers conquered Peru. Three years later (1535) he founded the nation's new capital Lima.
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Radar because the waves are reflected back off of the source so with the reflection it's hard for them to see earth surface.
The answer is 4 is helps you estimate the distance between two places.
plate boundary can produce volcanoes
