Read this table of contents.

CONTENTS



2....................................................Preface

5..............................................Introduction

15...........................What Is a Coral Reef? 22...................................Extremely Fragile

36..........................Dangers Posed to Fish

40.......................Environmental Concerns 51.....................................In Great Danger

70....................................Measures Taken

87................................What Can You Do?



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Based on information found in this table of contents, what is the subject of this book?

the life cycle of coral reefs
the many benefits of coral reefs
the dangers faced by coral reefs
the fish that live in coral reefs