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What is the biggest difference between a scientific law and a scientific theory?

A. Laws explain the physical sciences, while theories explain only the life sciences.
B. Laws are demonstrated in nature frequently, while theories are demonstrated less regularly.
C. Laws take only temporary events into account, while theories discuss long-term phenomena.
D. Laws describe the events that occur in nature under certain conditions, while theories explain how nature works.

D.

Explanation:

In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.