They are accepted as true until they are proven false. Once a theory has been tested and it is wrong, then it is no longer true.
Answer:
The answer is D
Explanation:
A renewable resource is something that can be replenished, usually naturally. Since wind is a natural occurrence, D should be your answer.
A small amount of nitrogen is fixed by lightning, but most of the nitrogen harvested from the atmosphere is removed by nitrogen-fixing bacteria and cyanobacteria (formerly called blue-green algae). The nitrogen cycle transforms diatomic nitrogen gas into ammonium, nitrate, and nitrite compounds.
A part of the body that doesn’t contain melanin is the nails
