Final answer:
Marine iguanas swimming in the ocean experience energy gain through evaporation by excreting excess salt from their glands near the nose and sneezing out water vapor that is high in salt content. The correct option for the given question is C.
Step-by-step explanation:
Experiences energy gain through evaporation. Marine iguanas swimming in the ocean experience energy gain through evaporation. They can excrete excess salt from their glands located near the nose, which results in the sneezing out of water vapor that is high in salt content.