Christmas Island Crabs Migration

Which idea is best expressed in the cartoon at the end of the selection?

• Red crabs shed their shells many times during their lives.
• More than 100 crab species live on Christmas Island.
• Red crabs rely on their instincts during their migration.
• Female red crabs can produce as many as 100,000 eggs.

Read the origin of the word navigate:
from Latin navis (ship) + agere (drive)
This information helps the reader understand that navigate in paragraph 3 means.

• overcome problems
• accomplish a difficult goal
• desire a leading role
• find the way to a destination

The author included paragraph 1 in the selection most likely to-

• provide background information about the home of the red crabs
• explain why it is important for the red crabs to reach the ocean
• provide reasons for visiting Christmas Island during the red crab migration
• explain why Christmas Island is a perfect place for red crabs to live

Which sentence from the selection supports the idea that Christmas Island is a special place?

• The red land crab makes up the largest population of the land crab species.
• The island boasts an array of exotic plants and animals, some of which are found nowhere else in the world.
• Only 1,500 or so people lived on the island as of 2010.
• Christmas Island is an Australian territory in the Indian Ocean.

In paragraph 2, the word treacherous means-

• quick
• unexpected
• dangerous
• questionable 

Which detail from the selection supports the idea that the island benefits from the red crabs?

• Millions of red crabs live in the rain forest that grows on the island.
• The red crabs lay their eggs along the shore of the island.
• The red crab migration attracts many visitors who spend money on the island.
• The red crabs cover the roadways during their migration.