1.) animal_is the structure or behavior that helps animals to survive in their environment 2.)fish have _for breathing

3.)animals that live in water called_

and the photo

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium