The underwater microphones — two in the kelp canopy and two above the canopy — recorded the chirps bouncing
off everything in the environment from oxygen bubbles from photosynthesis burbling up from the kelp to the kelp itself to the water's surface.
As we take our first bites, our parents supply us simultaneously with both nature (genes) and nurture (
environment in its broadest sense, including
everything from cuisine to family dynamics to religion to cutlery and table manners to the ethics of meat to views on whether it's acceptable to eat food
off the floor if it was there for only five seconds).