The following text describes a discovery in marine biology.
In 2023, researchers from the Coastal Marine Institute discovered a new species of jellyfish in the deep waters off the California coast. Unlike typical jellyfish, this species produces bioluminescence in complex patterns that appear to communicate information to other members of its species. The discovery suggests that jellyfish may be far more socially sophisticated than scientists previously believed.
Which choice best states the main idea of the text?
A new jellyfish species produces unique light patterns
The discovery of a new jellyfish species suggests they may have unexpected social abilities
California's deep waters contain many undiscovered species
Bioluminescence is common among marine creatures
Correct Answer: B
Choice B is the correct answer. The passage describes the discovery and emphasizes that the bioluminescent patterns "appear to communicate information," leading to the conclusion that jellyfish "may be far more socially sophisticated" than believed.
- Evidence: The text states the light patterns suggest social sophistication.
- Reasoning: The main idea connects the discovery to the broader implication about jellyfish behavior.
- Conclusion: The central focus is on what this discovery means for our understanding of jellyfish.
Choice A is incorrect because it only describes the discovery without the main implication. Choice C is incorrect because the text doesn't focus on California's undiscovered species in general. Choice D is incorrect because the text discusses one specific species, not bioluminescence in general.