Which oragisms do primary consumers mainly eat?
A. Producer
B. Secondary consumers
C. Predators
D. Decomposers

Which organisms do primary consumers mainly eat?

Primary consumers mainly feed on producers i.e they feed on autotrophs which are plants that makes their own food themselves

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.