(Tell me the letter of the correct answer)
1. What are polyps?
a. they are a group of plants.
b. they are a type of animal.
c. they are the combination of plants and animals.
d. some are considered plants while others are animals.
2. Why are corals hard?
a. they consist of carbon dioxide.
b. they are made of limestone.
c. they are made of cement.
d. they come from metals.
3. How are coral reefs formed?
a. when polyps get their food
b. when polyps live together
c. when polyps are destroyed
d. when polyps are eaten by fish
4. Why are corals important to marine life?
a. they're the habitat of marine animals.
b. they make the oceans and seas look blue.
c. they filter and purify the water.
d. they make the seawater salty.
5. How can we help in protecting our coral reefs?
a. collect corals
b. clean coral reefs
c. prevent dynamite fishing
d. throw oil into the waterways​