Cellular respiration describes the process that living cells use to release energy by combining sugar and oxygen. The primary chemical changes that happen during cellular respiration are shown in the equation below.

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Your answer is c. explanation: plasma  is the fourth state of matter, derived from the gaseous state of matter.  plasma  can contain free  electrons  and/or  ions. while  plasma is never neutral, it can either be positively or negatively charged.  gases, however, are electrically neutral.