What is the key explicit meaning of this passage?

Question

(1 point)
Belyaev became director of the new Institute of Cytology and Genetics.
Dogs and foxes are both canids and are therefore closely related.
The personality differences between dogs and foxes affect their ability to be domesticated.
The purpose of Belyaev’s fox experiment was to understand the domestication of dogs.

Answer 1

The key explicit meaning of the passage is that "The purpose of Belyaev’s fox experiment was to understand the domestication of dogs."