What kind of data structure allows elements of only one type to be stored efficiently?

An array is a data structure that allows for the efficient storage of elements of a single type. This efficiency comes from the array's ability to allocate a contiguous block of memory for its elements, enabling quick access and manipulation of data based on indices. Because the array knows the data type of its elements, the size of each element is uniform, which simplifies memory management and enhances performance when processing the data.

In contrast, while tuples can also store elements of a single type, they are typically immutable and not designed for efficient element manipulation like arrays. Stacks and queues are both specialized structures that handle data in specific orders—last in, first out for stacks and first in, first out for queues—but they do not emphasize type restriction in the same manner an array does. As such, arrays are the most appropriate choice for efficiently storing multiple items of the same type.