it is an organ. the main organ in the body. I wish your question was a little more clear, like multiple choice would be very helpful to what my choices are.
The sun, diamond mines, the air we breathe, labs, steel factories.
Answer:
Explanation:
Bonds form when atoms share or transfer valence electrons. In a covalent bond, two atoms share one or more electrons. Water is a polar molecule. A hydrogen bond is a relatively weak bond between two oppositely partially charged sides of two or more molecules.
Scales provide protection, they have lungs for breathing air, internal reproduction allows them to reproduce on land.
A plant retains about 23% of energy from the sun.
I Hope This Helps :)
