According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.

Option (C)

Explanation:

Gray water usually refers to water that are eliminated after the washing machine, bathtubs, and showers. These waters are drained in such a way that they do not come in contact with the feces. These are useful as they can be recycled and reuse. After recycling, this water can be used for irrigation purposes, washing clothes, and toilet flushing.

The use of this water helps in reducing the use of freshwater and saves a large amount of freshwater.

Thus, the correct answer is option (C).

a galvanic cell( aka voltaic cell) and electrolytic cell

explanation:

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the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons