What is a relevance of the "Protista?"

Protists are unicellular eukaryotes which show both plant and animal characters and these are considered as a bridge between plants and animals.

Explanation:

Protists are single-celled life forms and are eukaryotic organisms. Some of the protists like euglena shows both plant and animal characteristics. Protists are important in the following aspects -

it is prolly d and c and f

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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.