What is the central idea of the article? * A. Jellyfish populations are increasing and causing major problems for swimmers, fishermen, and the health of the ocean.
B. Jellyfish population are increasing, but most people are unaware of the problem, so nothing is being done about it.
C. Jellyfish populations are increasing and causing major problems, but the people of Barcelona, Spain have it all under control
D. Jellyfish populations are increasing and causing tourism to decline in Barcelona, Spain.

7. What precautions are being taken in Barcelona, Spain? *

A. The poisoning of certain jellyfish species.
B. Beaches have been closed indefinitely.
C. Jellyfish monitoring and removal.
D. Jellyfish study and identification.

8. How does warmer seas from global warming affect the jellyfish population? *

A. The warmer seas cause a decrease in population.
B. The jellyfish breed better and faster in the warmer waters.
C. The warmer seas cause jellyfish to leave the area.
D. The jellyfish eat more resources in warmer waters.

9. How does reduced rainfall from global warming affect the jellyfish population? *

A. Increased salinity allows them to better approach beaches.
B. Decreased salinity causes them to feel tired and sleep more.
C. Increased salinity makes them more aggressive.
D. Decreased salinity allows them to swim deeper.

10. How does reduced oxygen and visibility from pollution affect the jellyfish population?

A. It makes them feel stronger and swim faster.
B. Jellyfish thrive in this environment and can eat in total darkness.
C. It makes them more active in the lower levels of the ocean.
D. Jellyfish are harmed by this environment and are in danger.