Some Caribbean islands are coral islands formed from
A.
tops of underwater mountains.
B.
skeletons of tiny sea animals.
C.
a long isthmus.
D.
high, flat plateaus.
What does your text say about coral islands?
The correct answer is B. skeletons of tiny sea animals.
Coral islands, also known as coral atolls, are formed from the accumulation of the skeletons of small marine organisms called coral polyps. Coral polyps are small, invertebrate animals that belong to the phylum Cnidaria. They have a hard exoskeleton made of calcium carbonate, which forms the structure of coral reefs.
To arrive at this answer, you can consider the following information:
1. Research on the formation of Caribbean islands: By studying the geology and formation of Caribbean islands, you can find information on their origins.
2. Understanding the process of coral reef formation: Learn about coral polyps and how they build coral reefs by secreting calcium carbonate.
3. Relating the information to Caribbean island formation: Correlate the knowledge of coral polyps and reef formation with the characteristics and formation processes of the Caribbean islands.
By using these steps, you can determine that Caribbean islands are formed by the accumulation of coral polyp skeletons, hence the correct answer is B.