lookup retrieves the value of a single element from which of the below data type?

The `lookup` function is used to retrieve the value associated with a specific key within a map, returning a default value if the key does not exist. Its primary purpose is key-value retrieval from map data structures.

`lookup` is not used for `set` data types; sets are unordered collections of unique values, typically accessed for membership or iteration.

`lookup` is not used for `string` data types; string manipulation functions are used for strings.

`lookup` is not used for `list` data types; elements in a list are typically accessed by their numeric index or using functions like `element`.