Question

In recent years, scientists have made remarkable discoveries about the intelligence of corvids—members of the crow family. These birds demonstrate sophisticated problem-solving abilities, including tool use and social learning. In one study, New Caledonian crows fashioned hooks from wire to retrieve food from deep containers, a behavior previously thought unique to humans. Even more intriguing, researchers observed these birds teaching these techniques to their offspring, suggesting a form of cultural transmission. This cognitive sophistication challenges traditional assumptions about avian intelligence and raises questions about the evolution of complex thinking in species far removed from primates.

What is the central idea of this passage?

a
Crows are more intelligent than most other bird species
b
New Caledonian crows are unique among birds in their tool use
c
The evolution of intelligence follows similar patterns across species
d
Scientific research has revealed unexpected cognitive abilities in corvids

Answer 1

The central idea of the passage is:

d. Scientific research has revealed unexpected cognitive abilities in corvids.