The cochlear nerve(also auditory or acoustic nerve)
Explanation:
The given reaction equation is as follows.
+ ___ 
As there is release of one hydrogen which shows that mass number has increase by 1 on the product side.
Therefore, particle
must be added in order to balance the given reaction equation.
Hence, the complete reaction equation will be as follows.

K is in the first group can form ion K⁺,
N is in third group can form negative ion (8-5=3) N³⁻
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Answer:
We need the picture to answer the question
Explanation:
but i did do this test and number 4 was biotic and number 5 was abotic hope this helped