A species of parasitic fly follows the sounds that male crickets make with their wings. The flies deposit their larvae in the crickets' bodies. As the
larvae develop and emerge from the crickets' bodies, the crickets die.
Researchers have discovered a genetic mutation in some crickets that
changes their wing structure and makes them silent. The crickets with
silent wings are found among crickets with normal wings when it is time to
mate. According to evolution by natural selection, which of the following is
the selective pressure that is selecting for the silent wings?*