Given a statement, generate a question such that the answer is contained in that statement.
--------
Question: The testicles connect to the vas deferens, then the seminal vesicles, then the prostate, then the urethra.

Answer: What do the testicles connect to?


Question: blending with colors and patterns is used by prey to avoid predators

Answer: Who uses colors and patterns to avoid predators?


Question: The calcium carbonate hardens and protects the shell.

Answer:
What hardens and protects the shell?