What are the energy saving
techniques used by the
Class Chondrichthyes?

Chondrichthyes characteristics include a cartilaginous skeleton, lack of a swim bladder, lipid storage restricted to the liver, unique hematopoietic organs, and bacteremia in clinically normal individuals. Variable reproductive strategies are employed throughout this vertebrate class.

Explanation:

ecotourism pay for conservation efforts.

the electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, x-rays, and gamma-rays.