Answer:
It is easy
Explanation:
give me BRainlist Answer and I will answer ( a piece of cake)
Answer:
The correct answer is B it"s a proven fact.
Explanation:
Any scientific theory is based upon many experiments ans observations.The experiment and observations are repeated many times to provide a scientific logic about that theory.
A scientific theory is accepted only when that theory is logically proved by various experiment ,observations,statistical analysis etc.