Final answer:
A varicocele is a condition characterized by the twisting of a testicle on its spermatic cord. The correct answer is b. false.
Step-by-step explanation:
A varicocele is a condition where there is the twisting of a testicle on its spermatic cord.
It is a complex sentence structure because there is a main clause and also a dependent clause.
In this case, the dependent clause is 'of a testicle on its spermatic cord', which modifies the noun 'twisting'.
The correct answer is b. false.