Um, I not positive, but I think fish don't need oxygen.
Answer:
a.8m/s is my ans it may help you
Hope this helps
Ps- U can pick between these two pictures
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Because it generates enough momentum to keep the train going with out really having to speed up
When thermal energy of a substance increases, it's entropy(randomness) & Kinetic energy increases.
For more appropriate answer, you should put the options 'cause there could be more than one answer for this question.