Question

what does \subscript\ mean? a person with a very low voice a train that runs beneath the ground a number or letter written below the line a boat designed to go under the water

Explanation:

In language and mathematics, a subscript is a number, letter, or symbol written below the normal line. It is used for various purposes like indicating indices in sequences in math or chemical - element numbers in chemistry. The other options are incorrect definitions of "subscript".

Answer:

a number or letter written below the line