TOEFL Reading

❓ Question According to the passage, what was the primary observation from Paine's experiments with Pisaster ochraceus?

A. A. The removal of Pisaster led to an increase in the population of barnacles and algae.
B. B. The absence of Pisaster allowed mussels to dominate, reducing overall species diversity.
C. C. The presence of Pisaster decreased the biomass of mussels but increased algal growth.
D. D. The introduction of Pisaster caused a collapse in the intertidal community structure.

B. The absence of Pisaster allowed mussels to dominate, reducing overall species diversity.

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