Which of the following would be an example of refraction? A. A band playing together.

B. Light traveling from the sun to my car seat.

C. A bat finding food.

D. Water flowing from an opening in a water dam.

B. Light traveling from the sun to my car seat.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.