Question

what is tunnels explain it​

Answer 1

Answer:

A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. ... A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal.

Explanation:

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Answer 2

Explanation:

tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. ... A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal.