Answer:
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The connotation of narrow in the passage create a feeling of suffocation. Narrow means having a small distance from the one side to the other. This could be related to suffocation due to the small space.
DescriptionRedox is a type of chemical reaction in which the oxidation states of atoms are changed. Redox reactions are characterized by the actual or formal transfer of electrons between chemical species, most often with one species undergoing oxidation while another species undergoes reduction.