Slicing can best be described as
1). assigning a value to a variable
2). combining two or more strings to form one big string
3). pulling out one specific character from a string
4). pulling out groups of characters from a string

Option 4 : Pulling out groups of characters from a string.

Explanation:

Slicing can be defined as choosing a specific part from the string and presenting it another string.Hence slicing() is a method used to extract required parts from the string.Syntax for method slice() is as follows:

            string.slice(start, end)

Where start and end are parameters for determining the part of the string to be extracted. These parameters work as an index to actual string.

For example:

Extract the characters from position 3 to 8:

                 var str = "Hello world!";

                 var res = str.slice(3, 8);