Answer:
D.
Explanation:
The periodic table is divided into vertical periods and horizontal groups
The answer is A.) Theoretic
Jet airplanes take up a lot of fuel and money. Not only are they burning fossil fuels quickly, but they're also being flown on a basis. Planes are sent out constantly, and the amount of carbon it releases into the atmosphere is incredibly dangerous.
Homeostasis is the maintenance of a stable level of internal conditions even though environmental conditions are constantly changing. Metabolism is the sum of all the chemical reactions that take in and transform energy and materials from the environment.
