It’s for a test helpp

Iwill give brainliest if you answer right : )

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?