I NEED HELP!
In my first days at the conservancy, I learned a lot about sea turtles, like their amazing instincts and adaptation —that a green sea turtle could hold its breath for as long as five hours, and could slow its heart rate to 10 beats per minute to conserve oxygen.
What does the word adaptation mean in this paragraph?
a) trait that helps a creature survive in a particular environment
b) a creature's ability to hold its breath or adjust its heart rate
c) trait that changes as an organism grows
d) a creature's ability to develop a new skill through practice