Question

gain intensity as the canyon narrows. when the swells suddenly meet the shallow continental shelf, wave height increases dramatically, resulting in the 100-foot waves that have made nazaré famous. which choice best describes the overall structure of the text? choose 1 answer: a it introduces a location known for an unusual phenomenon, then explains the scientific cause of that phenomenon. b it presents a new theory, then provides evidence both supporting and challenging that theory. c it describes a notable destination, then outlines the environmental threats facing that location. d it identifies a recent scientific discovery, then discusses how that discovery challenged previous assumptions held by scientists.

Explanation:

The text first mentions Nazaré (a location) known for 100 - foot waves (an unusual phenomenon). Then it explains the cause (swells meeting the continental shelf). Option A matches this structure. Option B is wrong as there's no new theory presented. Option C is incorrect as there are no environmental threats mentioned. Option D is wrong as there's no recent scientific discovery or challenge to previous assumptions.

Answer:

A. It introduces a location known for an unusual phenomenon, then explains the scientific cause of that phenomenon.