The obvious answer is a bc it does not use and toxic fuels
The process of physical change in state, that occurs when water vapor or gas converts into a liquid is condensation. According to the kinetic molecular theory, the particles lose kinetic energy and slow down and thus become more arranged and have a definite shape but an indefinite volume, a liquid.
I would say B). Hope this helps!
Gradualism is a pattern of evolution in which a species evolves at a slow, steady space. The correct answer is C.
The answer is D, photosynthesis and respiration.
—Evidence—
Oxygen is a byproduct of photosynthesis and, correspondingly, carbon dioxide the byproduct of respiration.
Oxygen gives our cells the ability to break down food in order to get the energy we need to survive. Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration.
