Step 1: Understanding the Concept
The analogy pairs a kind of variation with the level of biodiversity it represents.
Step 2: Left side
Intraspecific diversity is the variation within one species due to gene differences, so it is genetic diversity.
Step 3: Right side
Interspecific diversity is the variety among different species in an area, which is species diversity.
Final Answer:
Interspecific diversity corresponds to species diversity.
\[ \boxed{\text{(A) }\text{Species diversity}} \]