Arrays are described as immutable because they are two dimensional. are arranged sequentially. can be reordered. cannot be changed once they are defined.

Answer:Arrays are described as immutable because they cannot be changed once they are defined.

Explanation: Array can be defined as a variable created to hold any data or value. These data or values can be hold more than once. Arrays are of different types which are char, float, int and so on.

Immutable means when things cannot be changed, unable to change or altered.