In a community, there are five brown squirrels, five grey squirrels, and ten white squirrels. what is the relative abundance of brown squirrels?

a 5%
b 20%
c 25%
d 50%

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

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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.

the answer is 100% density i've answered this question before and done the quiz myself.