Platinum is a catalyst humans use in fuel cell. Although for green energy humans use some bacteria that releases enzymes such as hydrogenase to perform functions as platinum in fuel cell. This is an example of a. Biofilm
b. Biosensing
c. Biomimicry

B

Explanation:

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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.