Answer: A.
scale
Explanation: Scales are mostly used to compare and contrast, like balancing scale, or a scale from the amount of people in America and in another country.
Answer: Diffusion
Explanation:
The size a bacterium can reach is being determined by Diffusion. How big the bacterial cell is would decide how slowly nutrients would move from the edge of the bacterium to it's interior.
The answer is: To make sure business is conducted safely and fairly
Business is created to obtain profit. Often times, safety precautions and fairplay that corporations need to take to protect the consumers would reduce the amount of profit that they can obtain. This cause many of the corporations started to overlook the safety precaution.
Because of this, government creates regulations in order to protect the consumers and ensure the corporations do not cheat each other.