Not sure on what graph 6 is suppose to look like I have to have 6 more but not really understanding

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.

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what are the options

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.